v3.25.0.1
Average Annual Total Returns - FidelityInternationalBondIndexFund-PRO - FidelityInternationalBondIndexFund-PRO - Fidelity International Bond Index Fund
Mar. 01, 2025
Fidelity International Bond Index Fund | Return Before Taxes  
Average Annual Return:  
Past 1 year 4.64%
Past 5 years 0.55%
Since Inception 0.31% [1]
Fidelity International Bond Index Fund | After Taxes on Distributions  
Average Annual Return:  
Past 1 year 3.20%
Past 5 years (0.15%)
Since Inception (0.38%) [1]
Fidelity International Bond Index Fund | After Taxes on Distributions and Sales  
Average Annual Return:  
Past 1 year 2.75%
Past 5 years 0.12%
Since Inception (0.06%) [1]
IXYYF  
Average Annual Return:  
Past 1 year 5.26%
Past 5 years 1.06%
Since Inception 0.85%
LB135  
Average Annual Return:  
Past 1 year (1.69%)
Past 5 years (1.96%)
Since Inception (1.80%)
[1]
A From October 10, 2019 .