Average Annual Total Returns - FidelityIntermediateLong-TermandShort-TermTreasuryBondIndexFunds-ComboPRO - FidelityIntermediateLong-TermandShort-TermTreasuryBondIndexFunds-ComboPRO - Fidelity Short-Term Treasury Bond Index Fund |
Apr. 29, 2025 |
|---|---|
| Fidelity Short-Term Treasury Bond Index Fund | Return Before Taxes | |
| Average Annual Return: | |
| Past 1 year | 3.25% |
| Past 5 years | 0.97% |
| Past 10 years | 1.28% |
| Fidelity Short-Term Treasury Bond Index Fund | After Taxes on Distributions | |
| Average Annual Return: | |
| Past 1 year | 2.09% |
| Past 5 years | 0.31% |
| Past 10 years | 0.66% |
| Fidelity Short-Term Treasury Bond Index Fund | After Taxes on Distributions and Sales | |
| Average Annual Return: | |
| Past 1 year | 1.97% |
| Past 5 years | 0.48% |
| Past 10 years | 0.72% |
| LB001 | |
| Average Annual Return: | |
| Past 1 year | 1.25% |
| Past 5 years | (0.33%) |
| Past 10 years | 1.35% |
| LB154 | |
| Average Annual Return: | |
| Past 1 year | 3.30% |
| Past 5 years | 1.00% |
| Past 10 years | 1.33% |