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Share Capital and Reserves - Summary of Ordinary Shares Repurchased (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Share Repurchased During The Period [Line Items]      
Purchase of treasury shares $ 1,161 $ 220 $ 886
Financial liability $ 281 $ 0  
Treasury shares [member]      
Disclosure Of Share Repurchased During The Period [Line Items]      
Number of Shares [1] 17,829,602 5,951,146  
Purchase of treasury shares $ 880 $ 220 $ 886
Share repurchase programme [member] | Treasury shares [member]      
Disclosure Of Share Repurchased During The Period [Line Items]      
Number of Shares 17,829,602 5,951,146  
Purchase of treasury shares $ 880 $ 220  
Total $ 1,161 $ 220  
[1] During 2021, CRH repurchased a total of 17,829,602 Ordinary Shares returning a further $0.9 billion of cash to shareholders. This brings total cash returned to shareholders under the share buyback programme (‘the Programme’) to $2.9 billion since its commencement in May 2018.