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Operating Expenses - Summary of Consolidated Operating Expense (Parenthetical) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Expense [Line items]      
Administrative expenses [1],[2] $ 979 $ 1,069 $ 1,104
Depreciation and amortization included in administrative expenses 142 145 132
Depreciation and amortization included in selling expenses 49 50 48
R&D activities by internal areas [member]      
Operating Expense [Line items]      
Administrative expenses $ 35 $ 31 $ 38
[1] All significant R&D activities are executed by several internal areas of CEMEX as part of their daily activities. In 2021, 2020 and 2019, total combined expenses of these departments recognized within administrative expenses were $35, $31 and $38, respectively.
[2] In 2021, 2020 and 2019, administrative expenses include depreciation and amortization of $142, $145 and $132, respectively, and selling expenses include depreciation and amortization of $49 in 2021, $50 in 2020 and $48 in 2019.