v3.26.1
Shareholder Report
 6 Months Ended
Apr. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Vanguard Charlotte Funds
Entity Central Index Key 0001532203
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2026
C000205452 [Member]  
Shareholder Report [Line Items]  
Fund Name Vanguard Global Credit Bond Fund
Class Name Investor Shares
Trading Symbol VGCIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Vanguard Global Credit Bond Fund (the "Fund") for the period of November 1, 2025, to April 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://personal1.vanguard.com/ngf‑next‑gen‑form‑webapp/fund‑literature. You can also request this information by contacting us at 800-662-7447.
Material Fund Change Notice [Text Block] The report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 800-662-7447
Additional Information Website https://personal1.vanguard.com/ngf‑next‑gen‑form‑webapp/fund‑literature
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Share Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment
Investor Shares $17 0.35%1
​1
Annualized.
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.35% [1]
Net Assets $ 979,000,000
Holdings Count | Holding 1,862
Investment Company Portfolio Turnover 75.00%
Additional Fund Statistics [Text Block]
Fund Statistics
(as of April 30, 2026)
Fund Net Assets
(in millions)		 $979
Number of Portfolio Holdings 1,862
Portfolio Turnover Rate 75%
Holdings [Text Block]
Portfolio Composition % of Net Assets
(as of April 30, 2026)
Africa 0.9%
Asia 4.2%
Europe 36.3%
North America 49.0%
Oceania 8.8%
South America 0.6%
Other Assets and Liabilities—Net 0.2%
This table reflects the Fund’s investments, including short-term investments, derivatives and other assets and liabilities.
Material Fund Change [Text Block]
How has the Fund changed?
Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Capital Management, LLC.
This is a summary of certain changes to the Fund since October 31, 2025. For more complete information, you may review the Fund’s prospectus at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature or upon request at 800-662-7447.
Summary of Change Legend [Text Block]
This is a summary of certain changes to the Fund since October 31, 2025. For more complete information, you may review the Fund’s prospectus at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature or upon request at 800-662-7447.
Updated Prospectus Phone Number 800-662-7447
Updated Prospectus Web Address https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature
C000205451 [Member]  
Shareholder Report [Line Items]  
Fund Name Vanguard Global Credit Bond Fund
Class Name Admiral™ Shares
Trading Symbol VGCAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Vanguard Global Credit Bond Fund (the "Fund") for the period of November 1, 2025, to April 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://personal1.vanguard.com/ngf‑next‑gen‑form‑webapp/fund‑literature. You can also request this information by contacting us at 800-662-7447.
Material Fund Change Notice [Text Block] The report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 800-662-7447
Additional Information Website https://personal1.vanguard.com/ngf‑next‑gen‑form‑webapp/fund‑literature
Expenses [Text Block]
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
Share Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment
Admiral Shares $12 0.25%1
​1
Annualized.
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.25% [2]
Net Assets $ 979,000,000
Holdings Count | Holding 1,862
Investment Company Portfolio Turnover 75.00%
Additional Fund Statistics [Text Block]
Fund Statistics
(as of April 30, 2026)
Fund Net Assets
(in millions)		 $979
Number of Portfolio Holdings 1,862
Portfolio Turnover Rate 75%
Holdings [Text Block]
Portfolio Composition % of Net Assets
(as of April 30, 2026)
Africa 0.9%
Asia 4.2%
Europe 36.3%
North America 49.0%
Oceania 8.8%
South America 0.6%
Other Assets and Liabilities—Net 0.2%
This table reflects the Fund’s investments, including short-term investments, derivatives and other assets and liabilities.
Material Fund Change [Text Block]
How has the Fund changed?
Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Capital Management, LLC.
This is a summary of certain changes to the Fund since October 31, 2025. For more complete information, you may review the Fund’s prospectus at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature or upon request at 800-662-7447.
Summary of Change Legend [Text Block]
This is a summary of certain changes to the Fund since October 31, 2025. For more complete information, you may review the Fund’s prospectus at https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature or upon request at 800-662-7447.
Updated Prospectus Phone Number 800-662-7447
Updated Prospectus Web Address https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature
[1]
Annualized.
[2]
Annualized.