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Goodwill and Intangible Assets, Net - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Risk free rate |  |  |  |  |  | 1.80% | 2.20% | 2.90% |
Increase in pre-tax discount rate |  |  |  |  |  | 1.00% |  |  |
Decrease in long-term growth rate |  |  |  |  |  | 1.00% |  |  |
Weighted average Operating EBITDA multiple |  |  |  |  |  | 11.5 | 11.5 | 11.5 |
Discount rates |  |  | 7.70% |  | 7.70% |  |  | 7.80% |
Impairment loss |  |  |  |  |  | $ 43 | $ 306 | $ 64 |
Impairment of finite lived intangible assets |  |  |  |  |  | $ 53 | $ 194 |  |
Cash flow projection period |  |  |  |  |  |  | 5 years |  |
Growth rate for cash flow projections |  |  |  |  |  |  | 2.50% | 2.00% |
Percentage of reduction in value in use of goodwill |  |  |  |  | 25.70% |  |  |  |
Market risk premium percentage |  |  |  |  |  | 5.80% | 5.70% | 5.60% |
Stock volatility factor |  |  |  |  |  | 1.12 | 1.19 | 1.08 |
Long term growth rate used to determine the terminal value |  |  | 2.00% |  | 2.00% |  |  | 2.50% |
Goodwill [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Impairment test |  |  |  | No |  |  |  |  |
Decrease Of Two Years In Cash Flow Projections [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Percentage Allocation In Respect Of Reduction In Value Of Goodwill |  |  |  |  |  |  | 51.50% |  |
Reduction In The Long Term Growth Rate [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Percentage Allocation In Respect Of Reduction In Value Of Goodwill |  |  |  |  |  |  | 27.30% |  |
Reduction In Sales Growth [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Percentage Allocation In Respect Of Reduction In Value Of Goodwill |  |  |  |  | 2.00% | 28.30% |  | 2.50% |
Reduction In Discount Rate [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Percentage Allocation In Respect Of Reduction In Value Of Goodwill |  |  |  |  |  | 7.10% |  |  |
Operating segments [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Weighted average Operating EBITDA multiple |  |  |  |  |  | 11.5 |  |  |
Impairment of finite lived intangible assets |  |  |  |  |  | $ 53 |  |  |
Others intangible assets [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Impairment of finite lived intangible assets |  |  |  |  |  | 4 | $ 13 |  |
Goodwill [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Impairment test |  |  |  |  | No |  |  |  |
Internally Developed Software [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Impairment loss |  |  |  |  |  | 49 |  |  |
Impairment of finite lived intangible assets | [1] |  |  |  |  | $ 49 |  |  |
Cemex [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Funding cost percentage |  |  |  |  |  | 4.10% | 4.10% | 5.40% | 7.30%
Risk free rate |  |  |  |  |  |  |  | 2.90% |
Discount rates |  |  |  |  |  |  | 0.10% | 1.50% |
Decrease In Weighing Of Debt Percentage |  |  |  |  |  | 26.90% | 34.60% | 31.70% | 33.50%
Cemex [Member] | Operating segments [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Discount rates |  |  |  |  |  | (0.10%) | 0.50% | 0.60% | 2.60%
Top of range [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Funding cost percentage |  |  |  |  |  | 4.10% |  |  |
Top of range [member] | Cemex [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Decription Of Stock Volatility Rate Increase |  |  |  |  |  |  |  | 1.08% |
Bottom of range [member] | Cemex [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Decription Of Stock Volatility Rate Increase |  |  |  |  |  |  |  |  | 1.06%
United States [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Percentage of goodwill allocated |  |  |  |  |  | 81.00% | 76.00% |  |
Discount rates |  |  |  |  |  | 7.20% | 7.30% | 7.80% |
Impairment loss |  |  |  |  |  | $ 18 | $ 76 | $ 6 |
Impairment of finite lived intangible assets |  |  |  |  |  | $ 181 |  |  |
Growth rate for cash flow projections | [2] |  |  |  |  | 2.00% | 2.00% | 2.50% |
Percentage reduction in long term growth rate |  |  |  |  |  |  | 0.50% |  |
United States [member] | Operating segments [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Discount rates |  |  |  |  |  | 1.00% |  |  |
United States [member] | Goodwill [member] | Operating segments [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Impairment of finite lived intangible assets |  | $ 440 | $ 1,020 |  |  |  |  |  |
United States [member] | Top of range [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Risk free rate |  |  |  |  |  | 1.80% |  |  |
Mexico [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Discount rates |  |  |  |  |  | 8.40% | 8.30% | 9.00% |
Growth rate for cash flow projections | [2] |  |  |  |  | 1.00% | 1.10% | 2.40% |
Percentage reduction in long term growth rate |  |  |  |  |  | 1.00% | 1.30% |  |
Spain [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Discount rates |  |  |  |  |  | 7.60% | 7.70% | 8.30% |
Impairment loss |  |  |  |  |  |  | $ 135 |  |
Growth rate for cash flow projections | [2] |  |  |  |  | 1.50% | 1.50% | 1.60% |
Spain [member] | Discount rate, measurement input [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Discount rate |  |  |  | 7.70% |  |  |  |  |
Spain [member] | Long Term Revenue Growth Rate Measurement Input [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Long term growth rate |  |  |  |  |  |  | 1.50% |  |
Spain [member] | Goodwill [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Non cash impairment charges |  |  |  |  |  | $ 317 |  |  |
Spain [member] | Operating segments [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Discount rates |  |  |  |  |  | 1.00% |  |  |
Growth rate for cash flow projections |  |  |  |  |  | 1.00% |  |  |
Spain [member] | Top of range [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Risk free rate |  |  |  |  |  | 2.40% |  |  |
Colombia [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Discount rates |  |  |  |  |  | 8.50% | 8.40% | 8.90% |
Impairment loss |  |  |  |  |  | $ 10 | $ 2 | $ 3 |
Growth rate for cash flow projections | [2] |  |  |  |  | 3.50% | 2.50% | 3.70% |
Percentage reduction in long term growth rate |  |  |  |  |  |  | 1.20% |  |
Egypt [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Discount rates |  |  |  |  |  | 10.70% | 10.20% | 10.30% |
Growth rate for cash flow projections | [2] |  |  |  |  | 3.00% | 5.60% | 6.00% |
Percentage reduction in long term growth rate |  |  |  |  |  | 2.80% |  |  |
UAE [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Allocated goodwill |  |  |  |  |  | $ 27 |  |  |
UAE [Member] | Discount rate, measurement input [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  | 8.30% |  |  |
UAE [Member] | Long Term Revenue Growth Rate Measurement Input [Member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Long term growth rate |  |  |  |  |  | 2.60% |  |  |
UAE [Member] | Goodwill [member] |  |  |  |  |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |  |  |  |  |
Non cash impairment charges |  |  |  |  |  | $ 96 |  |  |
[1] | Includes the capitalized direct costs incurred in the development stage of internal-use software, such as professional fees, direct labor and related travel expenses. The capitalized amounts are amortized to the statement of operations over a period ranging from 3 to 5 years.
[2] | The long-term growth rates are generally based on projections issued by the International Monetary Fund (“IMF”).

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