XML 14 R6.htm IDEA: XBRL DOCUMENT v3.22.0.1
Annual Total Returns - Fidelity® Total International Index Fund [BarChart] - 10.31 Fidelity Total International Index Fund PRO-13 - Fidelity® Total International Index Fund
Feb. 17, 2022
Bar Chart Table:  
Annual Return, Inception Date Jun. 07, 2016
Fidelity Total International Index Fund  
Bar Chart Table:  
Annual Return 2017 27.63%
Annual Return 2018 (14.38%)
Annual Return 2019 21.48%
Annual Return 2020 11.07%