S000050632 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg Municipal Bond Index (reflects no deductions for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.25% | 0.80% | 2.34% |
| Bloomberg Municipal 1-15 Year Index (reflects no deduction for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.18% | 1.16% | 2.27% |
| Bridge Builder Municipal Bond Fund | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.09% | 1.44% | 2.45% |
| Bridge Builder Municipal Bond Fund | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 5.02% | 1.40% | 2.42% |
| Bridge Builder Municipal Bond Fund | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.76% | 1.74% | 2.45% |