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Pensions and Post-Employment Benefits - Additional Information (Detail) £ in Millions, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2021 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 GBP (£) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 GBP (£) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 GBP (£)
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Costs of defined contribution plans |  | $ 47 |  | $ 48 |  | $ 50 |
Projected benefits obligation |  | 2,783 |  | 3,033 |  | 2,738 |
increase in the net projected liability |  | 10 |  | 10 |  | 10 |
Curtailment gain loss on settlement |  | $ 1 |  | 1 |  | 3 |
Period of settlement of one time settlement obligation |  | 20 years | 20 years |  |  |  |
Decrease in the net projected liability |  | $ 196 |  | (180) |  | (216) |
Decrease in the net projected liability |  | (20) |  | (18) |  | 11 |
Top of range [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Decrease in the net projected liability |  | 122 |  |  |  |  |
Decrease in the net projected liability |  | 20 |  |  |  |  |
Post employment healthcare benefits [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Projected benefits obligation |  | $ 69 |  | $ 78 |  |  |
Other Postretirement Benefits [Member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Curtailment gain loss on settlement | $ 1 |  |  |  |  |  |
Trinidad Cement Limited [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Medical inflation rates used to determine the projected benefits obligation |  | 5.00% |  | 10.50% |  |  |
Mexico [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Projected benefits obligation |  | $ 200 |  | $ 216 |  |  |
Medical inflation rates used to determine the projected benefits obligation |  | 7.00% |  | 8.00% |  |  |
Income from prior period adjustment of retirement benefit |  |  |  | $ 1 |  |  |
Puerto Rico [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Medical inflation rates used to determine the projected benefits obligation |  | 3.80% |  | 6.40% |  |  |
United Kingdom [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Projected benefits obligation |  | $ 1,794 |  | $ 1,925 |  |  |
Medical inflation rates used to determine the projected benefits obligation |  | 6.90% |  | 6.90% |  |  |
increase in the net projected liability |  | $ 81 |  |  |  |  |
Decrease in the net projected liability |  | 86 |  |  |  |  |
Decrease in the net projected liability |  | 12 |  |  |  |  |
United States [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Projected benefits obligation |  | 270 |  | $ 305 |  |  |
increase in the net projected liability |  | 81 |  |  |  |  |
Decrease in the net projected liability |  | 13 |  |  |  |  |
United States [member] | Transition to defined contribution plan [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
One time settlement obligation incurred due to transition of contribution plans |  | 24 |  |  |  |  |
United States And United Kingdom [member] | Multi-employer defined benefit plans [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Contribution to the multiemployer plans combined amounts |  | 58 |  | 56 |  | 64 |
Estimate of contribution to be made to the plan in the subsequent annual period |  | 59 |  |  |  |  |
France [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Income from prior period adjustment of retirement benefit |  |  |  | 2 |  |  |
Other Countries [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Projected benefits obligation |  | 339 |  | 368 |  |  |
Decrease in the net projected liability |  | 23 |  |  |  |  |
Germany [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Projected benefits obligation |  | 180 |  | 219 |  |  |
increase in the net projected liability |  | 81 |  |  |  |  |
CEMEX U.K. [member] |  |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |  |
Operating assets |  | 553 |  |  |  |  |
Dividends received |  | $ 30 | £ 22.3 | 29 | £ 21.3 | $ 27 | £ 20.3
Percentage of annual rate |  | 5.00% | 5.00% |  |  |  |
increase in the net projected liability |  |  |  | $ 54 |  |  |

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