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Business Combinations, Discontinued Operations, Sale of Other Disposal Groups and Selected Financial Information by Reportable Segment and Line of Business - Additional Information (Detail) $ in Millions |  |  |  |  |  | 1 Months Ended | 2 Months Ended | 6 Months Ended | 7 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 29, 2021 USD ($) | Mar. 31, 2021 USD ($) Integer | Mar. 06, 2020 USD ($) | Jun. 28, 2019 USD ($) | Mar. 29, 2019 USD ($) | May 31, 2019 USD ($) | Mar. 06, 2020 USD ($) | Jul. 09, 2021 USD ($) | Aug. 03, 2020 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jan. 31, 2021 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2018 USD ($)
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  | 37.80% |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 41 |  | $ 7,984 | [1] | $ 8,506 | [1] | $ 9,562 |  |  | $ 9,912
Sale of Assets Disposal Group |  |  |  |  | $ 387 |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities |  |  |  |  |  |  |  |  |  | 5,380 |  | 5,352 |  |  |  |  |
Loss on sale of discontinued operations |  |  |  |  |  |  |  | $ 67 |  |  |  |  |  |  |  |  |
Sale Of Assets |  | $ 44 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concrete Plants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number Of Assets Held For Sale | Integer |  | 24 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarry [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number Of Assets Held For Sale | Integer |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
White Cement Business [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration, on sale of operations |  |  |  |  | 155 |  |  |  |  |  |  |  |  |  |  |  |
CEMEX [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  | $ 8 |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture |  |  |  | 36 |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of business |  |  |  | $ 17 | $ 66 |  |  |  |  |  |  |  |  |  |  |  |
Gunter Papenburg [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture |  |  |  |  |  | $ 97 |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of business |  |  |  |  |  | $ 59 |  |  |  |  |  |  |  |  |  |  |
Discontinued operations [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of business |  |  |  |  |  |  |  |  |  | (4) |  | (45) |  | $ 55 |  |  |
Breedon Group Plc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  | 47 |  |  |  |  |
Gain (loss) on sale of business |  |  |  |  |  |  |  |  | $ 57 | 230 |  |  |  |  |  |  |
Current liabilities |  |  |  |  |  |  |  |  |  | 30 |  |  |  |  |  |  |
Kosoms [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional ownership percentage acquired |  |  | 75.00% |  |  |  | 75.00% |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  | $ 291 |  |  |  |  |
Proceeds from divestiture |  |  | $ 499 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of business |  |  | $ 665 |  |  |  | $ 14 |  |  |  |  |  |  |  |  |  |
Israel [member] | Kinneret and Beton-He'Emek [Member] | Readymix Business Netei Noy [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6 |  |
Goodwill |  |  |  |  |  |  |  |  |  | $ 5 |  |  |  |  |  |  |
Israel [member] | Ashtrom Industries [Member] | Readymix Business Netei Noy [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 33 |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2 |
Costa Rica and El Salvador [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration, on sale of operations | $ 335 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | This caption is primarily associated with Neoris N.V., CEMEX’s subsidiary involved in the sale of information technology and services.

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