v3.25.3
Shareholder Report
6 Months Ended
Aug. 31, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name T. ROWE PRICE MULTI-SECTOR ACCOUNT PORTFOLIOS, INC.
Entity Central Index Key 0001533490
Entity Investment Company Type N-1A
Document Period End Date Aug. 31, 2025
C000111140  
Shareholder Report [Line Items]  
Fund Name Mortgage-Backed Securities Multi-Sector Account Portfolio
No Trading Symbol [Flag] true
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Mortgage-Backed Securities Multi-Sector Account Portfolio
$1
0.02%
Expenses Paid, Amount $ 1
Expense Ratio, Percent 0.02%
AssetsNet $ 33,302,000
Holdings Count | Holding 673
InvestmentCompanyPortfolioTurnover 133.60%
Additional Fund Statistics [Text Block]

What are some fund statistics?

Fund Statistics

Total Net Assets (000s)
$33,302
Number of Portfolio Holdings
673
Holdings [Text Block]

Security Allocation (as a % of Net Assets)

U.S. Government & Agency Mortgage-Backed Securities
104.3%
Short-Term and Other
-4.3

Top Ten Holdings (as a % of Net Assets)

Federal National Mortgage Assn.
48.9%
Federal Home Loan Mortgage
26.8
Government National Mortgage Assn.
25.4
UMBS
3.2
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless