v3.25.1
Shareholder Report
6 Months Ended
Feb. 28, 2025
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name First American Funds Trust
Entity Central Index Key 0001890141
Entity Investment Company Type N-1A
Document Period End Date Feb. 28, 2025
Class A  
Shareholder Report [Line Items]  
Fund Name First American Government Obligations Fund
Class Name Class A
Trading Symbol FAAXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Government Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class A
$37
0.74%
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.74%
Net Assets $ 105,136,158,957
Holdings Count | $ / shares 369
Advisory Fees Paid, Amount $ 48,625,621
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$105,136,158,957
Number of Holdings
369
Net Advisory Fee
$48,625,621
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
43.2%
U.S. Treasury Debt
27.8%
U.S. Government Agency Debt
22.4%
U.S. Government Agency Repurchase Agreements
5.8%
Investment Companies
0.9%
Other Assets and Liabilities, Net
-0.1%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class D  
Shareholder Report [Line Items]  
Fund Name First American Government Obligations Fund
Class Name Class D
Trading Symbol FGDXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Government Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class D
$30
0.60%
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.60%
Net Assets $ 105,136,158,957
Holdings Count | $ / shares 369
Advisory Fees Paid, Amount $ 48,625,621
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$105,136,158,957
Number of Holdings
369
Net Advisory Fee
$48,625,621
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
43.2%
U.S. Treasury Debt
27.8%
U.S. Government Agency Debt
22.4%
U.S. Government Agency Repurchase Agreements
5.8%
Investment Companies
0.9%
Other Assets and Liabilities, Net
-0.1%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class P  
Shareholder Report [Line Items]  
Fund Name First American Government Obligations Fund
Class Name Class P
Trading Symbol FPPXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Government Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class P
$7
0.14%
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.14%
Net Assets $ 105,136,158,957
Holdings Count | $ / shares 369
Advisory Fees Paid, Amount $ 48,625,621
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$105,136,158,957
Number of Holdings
369
Net Advisory Fee
$48,625,621
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
43.2%
U.S. Treasury Debt
27.8%
U.S. Government Agency Debt
22.4%
U.S. Government Agency Repurchase Agreements
5.8%
Investment Companies
0.9%
Other Assets and Liabilities, Net
-0.1%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class T  
Shareholder Report [Line Items]  
Fund Name First American Government Obligations Fund
Class Name Class T
Trading Symbol FTGXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Government Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class T
$20
0.40%
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.40%
Net Assets $ 105,136,158,957
Holdings Count | $ / shares 369
Advisory Fees Paid, Amount $ 48,625,621
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$105,136,158,957
Number of Holdings
369
Net Advisory Fee
$48,625,621
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
43.2%
U.S. Treasury Debt
27.8%
U.S. Government Agency Debt
22.4%
U.S. Government Agency Repurchase Agreements
5.8%
Investment Companies
0.9%
Other Assets and Liabilities, Net
-0.1%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class U  
Shareholder Report [Line Items]  
Fund Name First American Government Obligations Fund
Class Name Class U
Trading Symbol FGUXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Government Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class U
$6
0.12%
Expenses Paid, Amount $ 6
Expense Ratio, Percent 0.12%
Net Assets $ 105,136,158,957
Holdings Count | $ / shares 369
Advisory Fees Paid, Amount $ 48,625,621
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$105,136,158,957
Number of Holdings
369
Net Advisory Fee
$48,625,621
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
43.2%
U.S. Treasury Debt
27.8%
U.S. Government Agency Debt
22.4%
U.S. Government Agency Repurchase Agreements
5.8%
Investment Companies
0.9%
Other Assets and Liabilities, Net
-0.1%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class V  
Shareholder Report [Line Items]  
Fund Name First American Government Obligations Fund
Class Name Class V
Trading Symbol FVIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Government Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class V
$15
0.30%
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.30%
Net Assets $ 105,136,158,957
Holdings Count | $ / shares 369
Advisory Fees Paid, Amount $ 48,625,621
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$105,136,158,957
Number of Holdings
369
Net Advisory Fee
$48,625,621
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
43.2%
U.S. Treasury Debt
27.8%
U.S. Government Agency Debt
22.4%
U.S. Government Agency Repurchase Agreements
5.8%
Investment Companies
0.9%
Other Assets and Liabilities, Net
-0.1%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class X  
Shareholder Report [Line Items]  
Fund Name First American Government Obligations Fund
Class Name Class X
Trading Symbol FGXXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Government Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class X
$7
0.14%
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.14%
Net Assets $ 105,136,158,957
Holdings Count | $ / shares 369
Advisory Fees Paid, Amount $ 48,625,621
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$105,136,158,957
Number of Holdings
369
Net Advisory Fee
$48,625,621
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
43.2%
U.S. Treasury Debt
27.8%
U.S. Government Agency Debt
22.4%
U.S. Government Agency Repurchase Agreements
5.8%
Investment Companies
0.9%
Other Assets and Liabilities, Net
-0.1%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Y  
Shareholder Report [Line Items]  
Fund Name First American Government Obligations Fund
Class Name Class Y
Trading Symbol FGVXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Government Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Y
$23
0.45%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
Net Assets $ 105,136,158,957
Holdings Count | $ / shares 369
Advisory Fees Paid, Amount $ 48,625,621
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$105,136,158,957
Number of Holdings
369
Net Advisory Fee
$48,625,621
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
43.2%
U.S. Treasury Debt
27.8%
U.S. Government Agency Debt
22.4%
U.S. Government Agency Repurchase Agreements
5.8%
Investment Companies
0.9%
Other Assets and Liabilities, Net
-0.1%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Z  
Shareholder Report [Line Items]  
Fund Name First American Government Obligations Fund
Class Name Class Z
Trading Symbol FGZXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Government Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Z
$9
0.18%
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18%
Net Assets $ 105,136,158,957
Holdings Count | $ / shares 369
Advisory Fees Paid, Amount $ 48,625,621
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$105,136,158,957
Number of Holdings
369
Net Advisory Fee
$48,625,621
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
43.2%
U.S. Treasury Debt
27.8%
U.S. Government Agency Debt
22.4%
U.S. Government Agency Repurchase Agreements
5.8%
Investment Companies
0.9%
Other Assets and Liabilities, Net
-0.1%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class T  
Shareholder Report [Line Items]  
Fund Name First American Institutional Prime Obligations Fund
Class Name Class T
Trading Symbol FIUXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Institutional Prime Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class T
$20
0.40%
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.40%
Net Assets $ 1,205,243,470
Holdings Count | $ / shares 22
Advisory Fees Paid, Amount $ 554,071
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$1,205,243,470
Number of Holdings
22
Net Advisory Fee
$554,071
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
47.9%
Other Repurchase Agreements
26.7%
Non-Negotiable Time Deposits
8.3%
Financial Company Commercial Paper
8.3%
Asset Backed Commercial Paper
7.1%
Variable Rate Demand Note
1.9%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class V  
Shareholder Report [Line Items]  
Fund Name First American Institutional Prime Obligations Fund
Class Name Class V
Trading Symbol FPIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Institutional Prime Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class V
$15
0.30%
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.30%
Net Assets $ 1,205,243,470
Holdings Count | $ / shares 22
Advisory Fees Paid, Amount $ 554,071
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$1,205,243,470
Number of Holdings
22
Net Advisory Fee
$554,071
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
47.9%
Other Repurchase Agreements
26.7%
Non-Negotiable Time Deposits
8.3%
Financial Company Commercial Paper
8.3%
Asset Backed Commercial Paper
7.1%
Variable Rate Demand Note
1.9%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Y  
Shareholder Report [Line Items]  
Fund Name First American Institutional Prime Obligations Fund
Class Name Class Y
Trading Symbol FAIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Institutional Prime Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Y
$23
0.45%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
Net Assets $ 1,205,243,470
Holdings Count | $ / shares 22
Advisory Fees Paid, Amount $ 554,071
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$1,205,243,470
Number of Holdings
22
Net Advisory Fee
$554,071
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
47.9%
Other Repurchase Agreements
26.7%
Non-Negotiable Time Deposits
8.3%
Financial Company Commercial Paper
8.3%
Asset Backed Commercial Paper
7.1%
Variable Rate Demand Note
1.9%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Z  
Shareholder Report [Line Items]  
Fund Name First American Institutional Prime Obligations Fund
Class Name Class Z
Trading Symbol FPZXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Institutional Prime Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Z
$10
0.20%
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.20%
Net Assets $ 1,205,243,470
Holdings Count | $ / shares 22
Advisory Fees Paid, Amount $ 554,071
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$1,205,243,470
Number of Holdings
22
Net Advisory Fee
$554,071
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
47.9%
Other Repurchase Agreements
26.7%
Non-Negotiable Time Deposits
8.3%
Financial Company Commercial Paper
8.3%
Asset Backed Commercial Paper
7.1%
Variable Rate Demand Note
1.9%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class A  
Shareholder Report [Line Items]  
Fund Name First American Retail Prime Obligations Fund
Class Name Class A
Trading Symbol FAPXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Prime Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class A
$38
0.75%
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75%
Net Assets $ 3,480,397,763
Holdings Count | $ / shares 173
Advisory Fees Paid, Amount $ 1,468,124
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$3,480,397,763
Number of Holdings
173
Net Advisory Fee
$1,468,124
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Other Repurchase Agreements
25.1%
Financial Company Commercial Paper
19.5%
U.S. Treasury Repurchase Agreements
18.5%
Asset Backed Commercial Paper
13.3%
Non-Financial Company Commercial Paper
7.8%
Non-Negotiable Time Deposits
7.6%
Other Instruments
4.8%
Certificates of Deposit
4.2%
Other Assets and Liabilities, Net
-0.8%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class T  
Shareholder Report [Line Items]  
Fund Name First American Retail Prime Obligations Fund
Class Name Class T
Trading Symbol FEIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Prime Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class T
$20
0.40%
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.40%
Net Assets $ 3,480,397,763
Holdings Count | $ / shares 173
Advisory Fees Paid, Amount $ 1,468,124
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$3,480,397,763
Number of Holdings
173
Net Advisory Fee
$1,468,124
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Other Repurchase Agreements
25.1%
Financial Company Commercial Paper
19.5%
U.S. Treasury Repurchase Agreements
18.5%
Asset Backed Commercial Paper
13.3%
Non-Financial Company Commercial Paper
7.8%
Non-Negotiable Time Deposits
7.6%
Other Instruments
4.8%
Certificates of Deposit
4.2%
Other Assets and Liabilities, Net
-0.8%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class V  
Shareholder Report [Line Items]  
Fund Name First American Retail Prime Obligations Fund
Class Name Class V
Trading Symbol FPUXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Prime Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class V
$15
0.30%
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.30%
Net Assets $ 3,480,397,763
Holdings Count | $ / shares 173
Advisory Fees Paid, Amount $ 1,468,124
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$3,480,397,763
Number of Holdings
173
Net Advisory Fee
$1,468,124
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Other Repurchase Agreements
25.1%
Financial Company Commercial Paper
19.5%
U.S. Treasury Repurchase Agreements
18.5%
Asset Backed Commercial Paper
13.3%
Non-Financial Company Commercial Paper
7.8%
Non-Negotiable Time Deposits
7.6%
Other Instruments
4.8%
Certificates of Deposit
4.2%
Other Assets and Liabilities, Net
-0.8%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class X  
Shareholder Report [Line Items]  
Fund Name First American Retail Prime Obligations Fund
Class Name Class X
Trading Symbol FXRXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Prime Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class X
$7
0.14%
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.14%
Net Assets $ 3,480,397,763
Holdings Count | $ / shares 173
Advisory Fees Paid, Amount $ 1,468,124
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$3,480,397,763
Number of Holdings
173
Net Advisory Fee
$1,468,124
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Other Repurchase Agreements
25.1%
Financial Company Commercial Paper
19.5%
U.S. Treasury Repurchase Agreements
18.5%
Asset Backed Commercial Paper
13.3%
Non-Financial Company Commercial Paper
7.8%
Non-Negotiable Time Deposits
7.6%
Other Instruments
4.8%
Certificates of Deposit
4.2%
Other Assets and Liabilities, Net
-0.8%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Y  
Shareholder Report [Line Items]  
Fund Name First American Retail Prime Obligations Fund
Class Name Class Y
Trading Symbol FYRXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Prime Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Y
$23
0.45%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
Net Assets $ 3,480,397,763
Holdings Count | $ / shares 173
Advisory Fees Paid, Amount $ 1,468,124
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$3,480,397,763
Number of Holdings
173
Net Advisory Fee
$1,468,124
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Other Repurchase Agreements
25.1%
Financial Company Commercial Paper
19.5%
U.S. Treasury Repurchase Agreements
18.5%
Asset Backed Commercial Paper
13.3%
Non-Financial Company Commercial Paper
7.8%
Non-Negotiable Time Deposits
7.6%
Other Instruments
4.8%
Certificates of Deposit
4.2%
Other Assets and Liabilities, Net
-0.8%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Z  
Shareholder Report [Line Items]  
Fund Name First American Retail Prime Obligations Fund
Class Name Class Z
Trading Symbol FZRXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Prime Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Z
$10
0.20%
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.20%
Net Assets $ 3,480,397,763
Holdings Count | $ / shares 173
Advisory Fees Paid, Amount $ 1,468,124
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$3,480,397,763
Number of Holdings
173
Net Advisory Fee
$1,468,124
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Other Repurchase Agreements
25.1%
Financial Company Commercial Paper
19.5%
U.S. Treasury Repurchase Agreements
18.5%
Asset Backed Commercial Paper
13.3%
Non-Financial Company Commercial Paper
7.8%
Non-Negotiable Time Deposits
7.6%
Other Instruments
4.8%
Certificates of Deposit
4.2%
Other Assets and Liabilities, Net
-0.8%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class A  
Shareholder Report [Line Items]  
Fund Name First American Retail Tax Free Obligations Fund
Class Name Class A
Trading Symbol FTAXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Tax Free Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class A
$37
0.75%
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.75%
Net Assets $ 395,555,901
Holdings Count | $ / shares 59
Advisory Fees Paid, Amount $ 172,068
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$395,555,901
Number of Holdings
59
Net Advisory Fee
$172,068
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Variable Rate Demand Notes
75.7%
Non-Financial Company Commercial Paper
13.7%
Other Municipal Securities
11.3%
Other Assets and Liabilities, Net
-0.7%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class T  
Shareholder Report [Line Items]  
Fund Name First American Retail Tax Free Obligations Fund
Class Name Class T
Trading Symbol FTJXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Tax Free Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class T
$20
0.40%
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.40%
Net Assets $ 395,555,901
Holdings Count | $ / shares 59
Advisory Fees Paid, Amount $ 172,068
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$395,555,901
Number of Holdings
59
Net Advisory Fee
$172,068
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Variable Rate Demand Notes
75.7%
Non-Financial Company Commercial Paper
13.7%
Other Municipal Securities
11.3%
Other Assets and Liabilities, Net
-0.7%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class V  
Shareholder Report [Line Items]  
Fund Name First American Retail Tax Free Obligations Fund
Class Name Class V
Trading Symbol FHIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Tax Free Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class V
$15
0.30%
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.30%
Net Assets $ 395,555,901
Holdings Count | $ / shares 59
Advisory Fees Paid, Amount $ 172,068
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$395,555,901
Number of Holdings
59
Net Advisory Fee
$172,068
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Variable Rate Demand Notes
75.7%
Non-Financial Company Commercial Paper
13.7%
Other Municipal Securities
11.3%
Other Assets and Liabilities, Net
-0.7%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Y  
Shareholder Report [Line Items]  
Fund Name First American Retail Tax Free Obligations Fund
Class Name Class Y
Trading Symbol FFCXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Tax Free Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Y
$22
0.45%
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.45%
Net Assets $ 395,555,901
Holdings Count | $ / shares 59
Advisory Fees Paid, Amount $ 172,068
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$395,555,901
Number of Holdings
59
Net Advisory Fee
$172,068
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Variable Rate Demand Notes
75.7%
Non-Financial Company Commercial Paper
13.7%
Other Municipal Securities
11.3%
Other Assets and Liabilities, Net
-0.7%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Z  
Shareholder Report [Line Items]  
Fund Name First American Retail Tax Free Obligations Fund
Class Name Class Z
Trading Symbol FTZXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Retail Tax Free Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Z
$10
0.20%
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.20%
Net Assets $ 395,555,901
Holdings Count | $ / shares 59
Advisory Fees Paid, Amount $ 172,068
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$395,555,901
Number of Holdings
59
Net Advisory Fee
$172,068
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
Variable Rate Demand Notes
75.7%
Non-Financial Company Commercial Paper
13.7%
Other Municipal Securities
11.3%
Other Assets and Liabilities, Net
-0.7%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class A  
Shareholder Report [Line Items]  
Fund Name First American Treasury Obligations Fund
Class Name Class A
Trading Symbol FATXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Treasury Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class A
$37
0.74%
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.74%
Net Assets $ 53,957,197,823
Holdings Count | $ / shares 110
Advisory Fees Paid, Amount $ 24,185,266
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$53,957,197,823
Number of Holdings
110
Net Advisory Fee
$24,185,266
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
56.2%
U.S. Treasury Debt
44.0%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class D  
Shareholder Report [Line Items]  
Fund Name First American Treasury Obligations Fund
Class Name Class D
Trading Symbol FTDXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Treasury Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class D
$30
0.59%
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.59%
Net Assets $ 53,957,197,823
Holdings Count | $ / shares 110
Advisory Fees Paid, Amount $ 24,185,266
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$53,957,197,823
Number of Holdings
110
Net Advisory Fee
$24,185,266
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
56.2%
U.S. Treasury Debt
44.0%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class P  
Shareholder Report [Line Items]  
Fund Name First American Treasury Obligations Fund
Class Name Class P
Trading Symbol FUPXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Treasury Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class P
$8
0.16%
Expenses Paid, Amount $ 8
Expense Ratio, Percent 0.16%
Net Assets $ 53,957,197,823
Holdings Count | $ / shares 110
Advisory Fees Paid, Amount $ 24,185,266
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$53,957,197,823
Number of Holdings
110
Net Advisory Fee
$24,185,266
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
56.2%
U.S. Treasury Debt
44.0%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class T  
Shareholder Report [Line Items]  
Fund Name First American Treasury Obligations Fund
Class Name Class T
Trading Symbol FTTXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Treasury Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class T
$20
0.40%
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.40%
Net Assets $ 53,957,197,823
Holdings Count | $ / shares 110
Advisory Fees Paid, Amount $ 24,185,266
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$53,957,197,823
Number of Holdings
110
Net Advisory Fee
$24,185,266
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
56.2%
U.S. Treasury Debt
44.0%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class V  
Shareholder Report [Line Items]  
Fund Name First American Treasury Obligations Fund
Class Name Class V
Trading Symbol FLIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Treasury Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class V
$15
0.30%
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.30%
Net Assets $ 53,957,197,823
Holdings Count | $ / shares 110
Advisory Fees Paid, Amount $ 24,185,266
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$53,957,197,823
Number of Holdings
110
Net Advisory Fee
$24,185,266
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
56.2%
U.S. Treasury Debt
44.0%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class X  
Shareholder Report [Line Items]  
Fund Name First American Treasury Obligations Fund
Class Name Class X
Trading Symbol FXFXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Treasury Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class X
$7
0.14%
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.14%
Net Assets $ 53,957,197,823
Holdings Count | $ / shares 110
Advisory Fees Paid, Amount $ 24,185,266
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$53,957,197,823
Number of Holdings
110
Net Advisory Fee
$24,185,266
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
56.2%
U.S. Treasury Debt
44.0%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Y  
Shareholder Report [Line Items]  
Fund Name First American Treasury Obligations Fund
Class Name Class Y
Trading Symbol FOCXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Treasury Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Y
$23
0.45%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
Net Assets $ 53,957,197,823
Holdings Count | $ / shares 110
Advisory Fees Paid, Amount $ 24,185,266
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$53,957,197,823
Number of Holdings
110
Net Advisory Fee
$24,185,266
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
56.2%
U.S. Treasury Debt
44.0%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Z  
Shareholder Report [Line Items]  
Fund Name First American Treasury Obligations Fund
Class Name Class Z
Trading Symbol FUZXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American Treasury Obligations Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Z
$9
0.18%
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18%
Net Assets $ 53,957,197,823
Holdings Count | $ / shares 110
Advisory Fees Paid, Amount $ 24,185,266
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$53,957,197,823
Number of Holdings
110
Net Advisory Fee
$24,185,266
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Repurchase Agreements
56.2%
U.S. Treasury Debt
44.0%
Other Assets and Liabilities, Net
-0.2%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class A  
Shareholder Report [Line Items]  
Fund Name First American US Treasury Money Market Fund
Class Name Class A
Trading Symbol FOEXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American US Treasury Money Market Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class A
$38
0.75%
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75%
Net Assets $ 7,305,487,232
Holdings Count | $ / shares 45
Advisory Fees Paid, Amount $ 3,170,122
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$7,305,487,232
Number of Holdings
45
Net Advisory Fee
$3,170,122
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Debt
100.3%
Other Assets and Liabilities, Net
-0.3%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class D  
Shareholder Report [Line Items]  
Fund Name First American US Treasury Money Market Fund
Class Name Class D
Trading Symbol FODXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American US Treasury Money Market Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class D
$30
0.60%
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.60%
Net Assets $ 7,305,487,232
Holdings Count | $ / shares 45
Advisory Fees Paid, Amount $ 3,170,122
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$7,305,487,232
Number of Holdings
45
Net Advisory Fee
$3,170,122
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Debt
100.3%
Other Assets and Liabilities, Net
-0.3%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class T  
Shareholder Report [Line Items]  
Fund Name First American US Treasury Money Market Fund
Class Name Class T
Trading Symbol FTKXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American US Treasury Money Market Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class T
$20
0.40%
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.40%
Net Assets $ 7,305,487,232
Holdings Count | $ / shares 45
Advisory Fees Paid, Amount $ 3,170,122
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$7,305,487,232
Number of Holdings
45
Net Advisory Fee
$3,170,122
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Debt
100.3%
Other Assets and Liabilities, Net
-0.3%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class V  
Shareholder Report [Line Items]  
Fund Name First American US Treasury Money Market Fund
Class Name Class V
Trading Symbol FUIXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American US Treasury Money Market Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class V
$15
0.30%
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.30%
Net Assets $ 7,305,487,232
Holdings Count | $ / shares 45
Advisory Fees Paid, Amount $ 3,170,122
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$7,305,487,232
Number of Holdings
45
Net Advisory Fee
$3,170,122
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Debt
100.3%
Other Assets and Liabilities, Net
-0.3%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Y  
Shareholder Report [Line Items]  
Fund Name First American US Treasury Money Market Fund
Class Name Class Y
Trading Symbol FOYXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American US Treasury Money Market Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Y
$23
0.45%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
Net Assets $ 7,305,487,232
Holdings Count | $ / shares 45
Advisory Fees Paid, Amount $ 3,170,122
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$7,305,487,232
Number of Holdings
45
Net Advisory Fee
$3,170,122
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Debt
100.3%
Other Assets and Liabilities, Net
-0.3%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Class Z  
Shareholder Report [Line Items]  
Fund Name First American US Treasury Money Market Fund
Class Name Class Z
Trading Symbol FOZXX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the First American US Treasury Money Market Fund (Fund) for the period of September 1, 2024, to February 28, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html. You can also request this information by contacting us at (800) 677-3863.
Additional Information Phone Number (800) 677-3863
Additional Information Website https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment (annualized)
Class Z
$10
0.20%
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.20%
Net Assets $ 7,305,487,232
Holdings Count | $ / shares 45
Advisory Fees Paid, Amount $ 3,170,122
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS
Net Assets
$7,305,487,232
Number of Holdings
45
Net Advisory Fee
$3,170,122
Holdings [Text Block]
Portfolio Allocation
(% of Net Assets)
U.S. Treasury Debt
100.3%
Other Assets and Liabilities, Net
-0.3%
Updated Prospectus Web Address https://www.firstamericanfunds.com/index/FundPerformance/ShareholderDocuments.html