| Form N-CSR Cover | 6 Months Ended |
| May 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Vanguard Wellington Fund |
| Entity Central Index Key | 0000105563 |
| Document Period End Date | May 31, 2024 |
| Shareholder Report | 6 Months Ended | |
| May 31, 2024 USD ($) Holding | ||
| Shareholder Report [Line Items] | ||
| Document Type | N-CSRS | |
| Amendment Flag | false | |
| Registrant Name | Vanguard Wellington Fund | |
| Entity Central Index Key | 0000105563 | |
| Document Period End Date | May 31, 2024 | |
| C000012164 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Vanguard Wellington™ Fund | |
| Class Name | Admiral™ Shares | |
| Trading Symbol | VWENX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Vanguard Wellington™ Fund (the "Fund") for the period of December 1, 2023, to May 31, 2024. | |
| 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 800-662-2739. | |
| Additional Information Phone Number | 800-662-2739 | |
| 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 $ 0.17 % 1 1 Annualized. | |
| Expenses Paid, Amount | $ 9 | |
| Expense Ratio, Percent | 0.17% | [1] |
| Net Assets | $ 111,040,000,000 | |
| Holdings Count | Holding | 1,474 | |
| Investment Company Portfolio Turnover | 31% | |
| Additional Fund Statistics [Text Block] | Fund Statistics Fund Net Assets $ % Number of Portfolio Holdings $ % Portfolio Turnover Rate $ % | |
| Holdings [Text Block] | This table reflects the Fund’s investments, including short-term investments and other assets and liabilities. Portfolio Composition % of Net Assets Asset-Backed/Commercial Mortgage-Backed Securities 1.2 % Common Stocks 64.5 % Corporate Bonds 21.5 % Sovereign Bonds 0.6 % Taxable Municipal Bonds 1.5 % U.S. Government and Agency Obligations 8.4 % Other Assets and Liabilities—Net 2.3 % | |
| C000012163 [Member] | ||
| Shareholder Report [Line Items] | ||
| Fund Name | Vanguard Wellington™ Fund | |
| Class Name | Investor Shares | |
| Trading Symbol | VWELX | |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about Vanguard Wellington™ Fund (the "Fund") for the period of December 1, 2023, to May 31, 2024. | |
| 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 800-662-2739. | |
| Additional Information Phone Number | 800-662-2739 | |
| 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 $ 0.25 % 1 1 Annualized. | |
| Expenses Paid, Amount | $ 13 | |
| Expense Ratio, Percent | 0.25% | [2] |
| Net Assets | $ 111,040,000,000 | |
| Holdings Count | Holding | 1,474 | |
| Investment Company Portfolio Turnover | 31% | |
| Additional Fund Statistics [Text Block] | Fund Statistics Fund Net Assets $ % Number of Portfolio Holdings $ % Portfolio Turnover Rate $ % | |
| Holdings [Text Block] | This table reflects the Fund’s investments, including short-term investments and other assets and liabilities. Portfolio Composition % of Net Assets Asset-Backed/Commercial Mortgage-Backed Securities 1.2 % Common Stocks 64.5 % Corporate Bonds 21.5 % Sovereign Bonds 0.6 % Taxable Municipal Bonds 1.5 % U.S. Government and Agency Obligations 8.4 % Other Assets and Liabilities—Net 2.3 % | |
| [1]Annualized.[2]Annualized. | ||
| Shareholder Report, Holdings (Details) | May 31, 2024 |
| C000012164 [Member] | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 64.50% |
| C000012164 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.50% |
| C000012164 [Member] | Taxable Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000012164 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| C000012164 [Member] | Asset Backed Commercial Mortgage Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000012164 [Member] | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000012164 [Member] | Other Assets And Liabilities Net [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| C000012163 [Member] | Common Stock [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 64.50% |
| C000012163 [Member] | Corporate Bond Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 21.50% |
| C000012163 [Member] | Taxable Municipal Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| C000012163 [Member] | US Government Corporations and Agencies Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.40% |
| C000012163 [Member] | Asset Backed Commercial Mortgage Backed Securities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| C000012163 [Member] | Sovereign Bonds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000012163 [Member] | Other Assets And Liabilities Net [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
