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Income Taxes - Schedule of Reconciliation Between Actual Income Tax Expense and Amount Computed by Applying Statutory Tax Rate (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]      
Mexican statutory tax rate value 30.00% 30.00% 30.00%
Difference between accounting and tax expenses, net 4.80% (18.40%) 111.20%
Non-taxable sale of equity securities and fixed assets (3.80%) 1.30% (13.40%)
Difference between book and tax inflation 23.90% (7.10%) 38.10%
Differences in the income tax rates in the countries where CEMEX operates 4.70% (0.90%) (31.90%)
Changes in deferred tax assets (48.70%) (9.60%) (59.80%)
Changes in provisions for uncertain tax positions 2.60% 0.20% (5.20%)
Others 2.00% 1.00% (3.00%)
Effective consolidated income tax expense rate 15.50% (3.50%) 66.00%
Mexican statutory tax rate $ 280 $ (391) $ 71
Difference between accounting and tax expenses, net 45 240 265
Non-taxable sale of equity securities and fixed assets (35) (17) (32)
Difference between book and tax inflation 223 92 91
Differences in the income tax rates in the countries where CEMEX operates 44 12 (76)
Changes in deferred tax assets (454) 125 (142)
Changes in provisions for uncertain tax positions 24 (3) (12)
Others 17 (13) (8)
Effective consolidated income tax expense rate $ 144 $ 45 $ 157