This semi-annual shareholder report contains important information about Vanguard California Municipal Money Market Fund (the "Fund") for the period of December 1, 2025, to May 31, 2026.

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

Additional Information Website

<span style="white-space: nowrap; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto;"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: collapse;"><span style="text-decoration: underline; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: collapse;">https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature</span></span></span>

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Investor Shares	$6	0.12%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 6

Expense Ratio, Percent

^[1]

0.12%

Material Change Date

Nov. 30, 2025

AssetsNet

$ 3,943,000,000

Holdings Count | Holding

249

Additional Fund Statistics [Text Block]

Fund Statistics (as of May 31, 2026)

Table Summary
Fund Net Assets (in millions)	$3,943
Number of Portfolio Holdings	249

Holdings [Text Block]

Distribution by Effective Maturity % of Net Assets (as of May 31, 2026)

Table Summary
1 to 7 Days	84.2%
8 to 30 Days	5.3%
31 to 60 Days	3.7%
61 to 90 Days	4.7%
91 to 180 Days	1.6%
Over 180 Days	0.1%
Other Assets and Liabilities—Net	0.4%

This table reflects the Fund's investments, including short-term investments 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 November 30, 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.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Capital Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000007066

Shareholder Report [Line Items]

Fund Name

California Intermediate-Term Tax-Exempt Fund

Class Name

Investor Shares

Trading Symbol

VCAIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard California Intermediate-Term Tax-Exempt Fund (the "Fund") for the period of December 1, 2025, to May 31, 2026.

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

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Investor Shares	$7	0.14%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 7

Expense Ratio, Percent

^[2]

0.14%

Material Change Date

Nov. 30, 2025

AssetsNet

$ 19,262,000,000

Holdings Count | Holding

5,208

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of May 31, 2026)

Table Summary
Fund Net Assets (in millions)	$19,262
Number of Portfolio Holdings	5,208
Portfolio Turnover Rate	5%

Holdings [Text Block]

Distribution by Stated Maturity % of Net Assets (as of May 31, 2026)

Table Summary
Less than 1 Year	6.1%
1 to 3 Years	9.1%
3 to 5 Years	10.7%
5 to 10 Years	31.7%
10 to 20 Years	40.4%
20 to 30 Years	1.9%
Greater than 30 Years	0.1%
Other Assets and Liabilities—Net	0.0%

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.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Capital Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000007067

Shareholder Report [Line Items]

Fund Name

California Intermediate-Term Tax-Exempt Fund

Class Name

Admiral™ Shares

Trading Symbol

VCADX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard California Intermediate-Term Tax-Exempt Fund (the "Fund") for the period of December 1, 2025, to May 31, 2026.

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

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[3]

0.09%

Material Change Date

Nov. 30, 2025

AssetsNet

$ 19,262,000,000

Holdings Count | Holding

5,208

InvestmentCompanyPortfolioTurnover

5.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of May 31, 2026)

Table Summary
Fund Net Assets (in millions)	$19,262
Number of Portfolio Holdings	5,208
Portfolio Turnover Rate	5%

Holdings [Text Block]

Distribution by Stated Maturity % of Net Assets (as of May 31, 2026)

Table Summary
Less than 1 Year	6.1%
1 to 3 Years	9.1%
3 to 5 Years	10.7%
5 to 10 Years	31.7%
10 to 20 Years	40.4%
20 to 30 Years	1.9%
Greater than 30 Years	0.1%
Other Assets and Liabilities—Net	0.0%

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.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Capital Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000007068

Shareholder Report [Line Items]

Fund Name

California Long-Term Tax-Exempt Fund

Class Name

Investor Shares

Trading Symbol

VCITX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard California Long-Term Tax-Exempt Fund (the "Fund") for the period of December 1, 2025, to May 31, 2026.

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

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Investor Shares	$7	0.14%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 7

Expense Ratio, Percent

^[4]

0.14%

Material Change Date

Nov. 30, 2025

AssetsNet

$ 6,100,000,000

Holdings Count | Holding

1,550

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of May 31, 2026)

Table Summary
Fund Net Assets (in millions)	$6,100
Number of Portfolio Holdings	1,550
Portfolio Turnover Rate	24%

Holdings [Text Block]

Distribution by Stated Maturity % of Net Assets (as of May 31, 2026)

Table Summary
Less than 1 Year	7.0%
1 to 3 Years	4.0%
3 to 5 Years	4.8%
5 to 10 Years	13.5%
10 to 20 Years	35.0%
20 to 30 Years	30.6%
Greater than 30 Years	4.6%
Other Assets and Liabilities—Net	0.5%

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.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Capital Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000007069

Shareholder Report [Line Items]

Fund Name

California Long-Term Tax-Exempt Fund

Class Name

Admiral™ Shares

Trading Symbol

VCLAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard California Long-Term Tax-Exempt Fund (the "Fund") for the period of December 1, 2025, to May 31, 2026.

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

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Admiral Shares	$5	0.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

^[5]

0.09%

Material Change Date

Nov. 30, 2025

AssetsNet

$ 6,100,000,000

Holdings Count | Holding

1,550

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of May 31, 2026)

Table Summary
Fund Net Assets (in millions)	$6,100
Number of Portfolio Holdings	1,550
Portfolio Turnover Rate	24%

Holdings [Text Block]

Distribution by Stated Maturity % of Net Assets (as of May 31, 2026)

Table Summary
Less than 1 Year	7.0%
1 to 3 Years	4.0%
3 to 5 Years	4.8%
5 to 10 Years	13.5%
10 to 20 Years	35.0%
20 to 30 Years	30.6%
Greater than 30 Years	4.6%
Other Assets and Liabilities—Net	0.5%

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.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Capital Management, LLC.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-662-7447

Updated Prospectus Web Address

https://personal1.vanguard.com/ngf-next-gen-form-webapp/fund-literature

C000247741

Shareholder Report [Line Items]

Fund Name

California Tax-Exempt Bond ETF

Class Name

ETF Shares

Trading Symbol

VTEC

Security Exchange Name

CboeBZX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Vanguard California Tax-Exempt Bond ETF (the "Fund") for the period of December 1, 2025, to May 31, 2026.

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

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Share Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
ETF Shares	$4	0.07%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized.

Expenses Paid, Amount

$ 4

Expense Ratio, Percent

^[6]

0.07%

Material Change Date

Nov. 30, 2025

AssetsNet

$ 2,648,000,000

Holdings Count | Holding

3,773

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Fund Statistics (as of May 31, 2026)

Table Summary
Fund Net Assets (in millions)	$2,648
Number of Portfolio Holdings	3,773
Portfolio Turnover Rate	3%

Holdings [Text Block]

Distribution by Stated Maturity % of Net Assets (as of May 31, 2026)

Table Summary
Less than 1 Year	5.9%
1 to 3 Years	8.5%
3 to 5 Years	8.7%
5 to 10 Years	21.4%
10 to 20 Years	30.1%
20 to 30 Years	23.8%
Greater than 30 Years	1.3%
Other Assets and Liabilities—Net	0.3%

This table reflects the Fund's investments, including short-term investments 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.

Material Fund Change Adviser [Text Block]

Effective January 12, 2026, The Vanguard Group, Inc. exercises portfolio management responsibilities for the fund through its wholly-owned subsidiary, Vanguard Capital Management, LLC.

Summary of Change Legend [Text Block]

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.
[3]	Annualized.
[4]	Annualized.
[5]	Annualized.
[6]	Annualized.