Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Millions	Total	Total Shareholders' Equity Attributable to CRH Shareholders	Preferred stock	Common stock	Treasury stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interests
Shares, outstanding, beginning balance (in shares) at Dec. 31, 2024			900,000	718,600,000
Balance at the beginning of the year at Dec. 31, 2024	$ 22,466	$ 21,607	$ 1	$ 290	$ (2,137)	$ 422	$ (1,005)	$ 24,036	$ 859
Treasury stock, common, shares beginning balance (in shares) at Dec. 31, 2024					(41,400,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(98)	(94)						(94)	(4)
Other comprehensive (loss) income	208	199					199		9
Share-based compensation	32	32				32
Repurchases and retirement of common stock (in shares)				(3,200,000)
Repurchases and retirement of common stock	(310)	(310)		$ (1)				(309)
Stock issued during period, shares, employee stock purchase plans (in shares)					2,500,000
Shares issued under employee share plans	(57)	(57)			$ 99	(156)
Dividends declared on common stock	(251)	(251)						(251)
Distributions to noncontrolling interests	(5)								(5)
Adjustment of redeemable noncontrolling interests to redemption value	(7)	(7)						(7)
Shares, outstanding, ending balance (in shares) at Mar. 31, 2025			900,000	715,400,000
Balance at the end of the year at Mar. 31, 2025	$ 21,978	21,119	$ 1	$ 289	$ (2,038)	298	(806)	23,375	859
Treasury stock, common, shares ending balance (in shares) at Mar. 31, 2025	(38,850,691)				(38,900,000)
Shares, outstanding, beginning balance (in shares) at Dec. 31, 2025			900,000	706,900,000
Balance at the beginning of the year at Dec. 31, 2025	$ 25,048	24,004	$ 1	$ 286	$ (2,016)	397	(257)	25,593	1,044
Treasury stock, common, shares beginning balance (in shares) at Dec. 31, 2025	(38,315,792)				(38,300,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (180)	(176)						(176)	(4)
Other comprehensive (loss) income	(84)	(96)					(96)		12
Share-based compensation	29	29				29
Repurchases and retirement of common stock (in shares)				(2,900,000)
Repurchases and retirement of common stock	(332)	(332)		$ (1)				(331)
Stock issued during period, shares, employee stock purchase plans (in shares)					2,500,000
Shares issued under employee share plans	(66)	(66)			$ 111	(176)		(1)
Dividends declared on common stock	(261)	(261)						(261)
Transactions involving noncontrolling interests	(24)	(24)						(24)
Adjustment of redeemable noncontrolling interests to redemption value	(7)	(7)						(7)
Shares, outstanding, ending balance (in shares) at Mar. 31, 2026			900,000	704,000,000
Balance at the end of the year at Mar. 31, 2026	$ 24,123	$ 23,071	$ 1	$ 285	$ (1,905)	$ 250	$ (353)	$ 24,793	$ 1,052
Treasury stock, common, shares ending balance (in shares) at Mar. 31, 2026	(35,793,257)				(35,800,000)