Average Annual Total Returns - FidelityIntermediateLong-TermandShort-TermTreasuryBondIndexFunds-ComboPRO - FidelityIntermediateLong-TermandShort-TermTreasuryBondIndexFunds-ComboPRO - Fidelity Long-Term Treasury Bond Index Fund |
Apr. 29, 2025 |
|---|---|
| Fidelity Long-Term Treasury Bond Index Fund | Return Before Taxes | |
| Average Annual Return: | |
| Past 1 year | (6.18%) |
| Past 5 years | (5.20%) |
| Past 10 years | 0.72% |
| Fidelity Long-Term Treasury Bond Index Fund | After Taxes on Distributions | |
| Average Annual Return: | |
| Past 1 year | (7.54%) |
| Past 5 years | (6.37%) |
| Past 10 years | (1.91%) |
| Fidelity Long-Term Treasury Bond Index Fund | After Taxes on Distributions and Sales | |
| Average Annual Return: | |
| Past 1 year | (3.63%) |
| Past 5 years | (4.15%) |
| Past 10 years | (0.92%) |
| LB001 | |
| Average Annual Return: | |
| Past 1 year | 1.25% |
| Past 5 years | (0.33%) |
| Past 10 years | 1.35% |
| LB010 | |
| Average Annual Return: | |
| Past 1 year | (6.41%) |
| Past 5 years | (5.20%) |
| Past 10 years | (0.64%) |