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Earnings per share (EPS) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Earnings Per Share [Abstract]    
Net (loss) income $ (98) $ 114
Net (income) attributable to redeemable noncontrolling interests 0 (2)
Net loss attributable to noncontrolling interests 4 4
Adjustment of redeemable noncontrolling interests to redemption value (7) (4)
Net Income (Loss) Available to Common Stockholders, Diluted, Total (101) 112
Net income attributable to CRH plc for EPS, basic $ (101) $ 112
Denominator    
Weighted average common shares outstanding, basic (in shares) 676,700,000 687,800,000
Effect of dilutive employee share awards (in shares) 0 5,600,000
Weighted average common shares outstanding, diluted (in shares) 676,700,000 693,400,000
Earnings per share attributable to CRH plc, basic (in USD per share) $ (0.15) $ 0.16
Earnings per share attributable to CRH plc, diluted (in USD per share) $ (0.15) $ 0.16
Antidilutive securities excluded from computation of earnings per share (in shares) 5,268,459 4,045,950