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, 2023			900,000	734,500,000
Balance at the beginning of the year at Dec. 31, 2023	$ 21,288	$ 20,854	$ 1	$ 296	$ (2,199)	$ 454	$ (616)	$ 22,918	$ 434
Treasury stock, common, shares beginning balance (in shares) at Dec. 31, 2023					(42,400,000)
Net income	112	116						116	(4)
Other comprehensive (loss) income	(188)	(181)					(181)		(7)
Share-based compensation	30	30				30
Repurchases of common stock (in shares)					(2,600,000)
Repurchases of common stock	(179)	(179)			$ (179)
Repurchases and retirement of common stock (in shares)				(5,000,000.0)
Repurchases and retirement of common stock	(380)	(380)		$ (2)				(378)
Shares issued under employee share plans (in shares)					3,100,000
Shares issued under employee share plans	0				$ 212	(147)		(65)
Dividends declared on common stock	(241)	(241)						(241)
Distributions to noncontrolling interests	(4)								(4)
Divestiture of noncontrolling interests	(18)								(18)
Adjustment of redeemable noncontrolling interests to redemption value	(4)	(4)						(4)
Shares, outstanding, ending balance (in shares) at Mar. 31, 2024			900,000	729,500,000
Balance at the end of the year at Mar. 31, 2024	$ 20,416	20,015	$ 1	$ 294	$ (2,166)	337	(797)	22,346	401
Treasury stock, common, shares ending balance (in shares) at Mar. 31, 2024	(41,897,429)				(41,900,000)
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	(41,355,384)				(41,400,000)
Net income	$ (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)
Shares issued under employee share 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)