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Share Capital and Reserves - Summary of Treasury Shares (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of Treasury Shares and Own Shares [Line Items]      
At 1 January $ (195)    
Cancellation of Treasury Shares 0 $ 0 $ 0
At 31 December (297) (195)  
Treasury Shares/own shares      
Disclosure of Treasury Shares and Own Shares [Line Items]      
At 1 January (195) (386)  
Own Shares released by the Employee Benefit Trust under the 2014 Performance Share Plan 173 117  
Shares acquired by CRH plc (Treasury Shares) (1,170) (880)  
Shares acquired by Employee Benefit Trust (own shares) (8) (16)  
Treasury Shares/own shares reissued 24 19  
Cancellation of Treasury Shares 879 951 150
At 31 December $ (297) $ (195) $ (386)
Number of shares issued [abstract]      
At 1 January 3,720,563 10,320,739  
Own Shares released by the Employee Benefit Trust under the 2014 Performance Share Plan (3,502,924) (3,254,236)  
Shares acquired by CRH plc (Treasury Shares) 29,755,861 17,829,602  
Shares acquired by Employee Benefit Trust (own shares) 189,088 345,981  
Treasury Shares/own shares reissued (449,703) (521,523)  
Cancellation of Treasury Shares (22,000,000) (21,000,000)  
Treasury Shares 7,398,112 3,476,859  
Own shares 314,773 243,704  
At 31 December 7,712,885 3,720,563 10,320,739