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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,791	2,789						2,789	2
Other comprehensive (loss) income	132	117					117		15
Share-based compensation	96	96				96
Repurchases of common stock (in shares)					(2,600,000)
Repurchases of common stock	(179)	(179)			$ (179)
Repurchases and retirement of common stock (in shares)				(13,200,000)
Repurchases and retirement of common stock	(1,045)	(1,045)		$ (5)				(1,040)
Stock issued during period, shares, employee stock purchase plans (in shares)					3,500,000
Shares issued under employee share plans	(8)	(8)			$ 237	(158)		(87)
Dividends declared on common stock	(719)	(719)						(719)
Distributions to noncontrolling interests	(10)								(10)
Divestiture of noncontrolling interests	(18)								(18)
Noncontrolling interests arising on acquisition	507								507
Adjustment of redeemable noncontrolling interests to redemption value	(30)	(30)						(30)
Shares, outstanding, ending balance (in shares) at Sep. 30, 2024			900,000	721,300,000
Balance at the end of the year at Sep. 30, 2024	$ 22,805	21,875	$ 1	$ 291	$ (2,141)	392	(499)	23,831	930
Treasury stock, common, shares ending balance (in shares) at Sep. 30, 2024	(41,493,074)				(41,500,000)
Shares, outstanding, beginning balance (in shares) at Jun. 30, 2024			900,000	725,100,000
Balance at the beginning of the year at Jun. 30, 2024	$ 21,116	20,726	$ 1	$ 292	$ (2,143)	359	(813)	23,030	390
Treasury stock, common, shares beginning balance (in shares) at Jun. 30, 2024					(41,500,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,380	1,376						1,376	4
Other comprehensive (loss) income	348	314					314		34
Share-based compensation	33	33				33
Repurchases and retirement of common stock (in shares)				(3,800,000)
Repurchases and retirement of common stock	(317)	(317)		$ (1)				(316)
Shares issued under employee share plans	4	4			$ 2			2
Dividends declared on common stock	(238)	(238)						(238)
Distributions to noncontrolling interests	(5)								(5)
Noncontrolling interests arising on acquisition	507								507
Adjustment of redeemable noncontrolling interests to redemption value	(23)	(23)						(23)
Shares, outstanding, ending balance (in shares) at Sep. 30, 2024			900,000	721,300,000
Balance at the end of the year at Sep. 30, 2024	$ 22,805	21,875	$ 1	$ 291	$ (2,141)	392	(499)	23,831	930
Treasury stock, common, shares ending balance (in shares) at Sep. 30, 2024	(41,493,074)				(41,500,000)
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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 2,735	2,728						2,728	7
Other comprehensive (loss) income	662	624					624		38
Share-based compensation	104	104				104
Repurchases and retirement of common stock (in shares)				(9,600,000)
Repurchases and retirement of common stock	(930)	(930)		$ (3)				(927)
Stock issued during period, shares, employee stock purchase plans (in shares)					2,800,000
Shares issued under employee share plans	(55)	(55)			$ 110	(165)
Dividends declared on common stock	(749)	(749)						(749)
Distributions to noncontrolling interests	(11)								(11)
Noncontrolling interests arising on acquisition	6								6
Transactions involving noncontrolling interests	2								2
Adjustment of redeemable noncontrolling interests to redemption value	(20)	(20)						(20)
Shares, outstanding, ending balance (in shares) at Sep. 30, 2025			900,000	709,000,000
Balance at the end of the year at Sep. 30, 2025	$ 24,210	23,309	$ 1	$ 287	$ (2,027)	361	(381)	25,068	901
Treasury stock, common, shares ending balance (in shares) at Sep. 30, 2025	(38,581,568)				(38,600,000)
Shares, outstanding, beginning balance (in shares) at Jun. 30, 2025			900,000	711,700,000
Balance at the beginning of the year at Jun. 30, 2025	$ 23,241	22,345	$ 1	$ 288	$ (2,028)	323	(345)	24,106	896
Treasury stock, common, shares beginning balance (in shares) at Jun. 30, 2025					(38,600,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,509	1,503						1,503	6
Other comprehensive (loss) income	(38)	(36)					(36)		(2)
Share-based compensation	38	38				38
Repurchases and retirement of common stock (in shares)				(2,700,000)
Repurchases and retirement of common stock	(286)	(286)		$ (1)				(285)
Shares issued under employee share plans	1	1			$ 1
Dividends declared on common stock	(249)	(249)						(249)
Distributions to noncontrolling interests	(5)								(5)
Noncontrolling interests arising on acquisition	6								6
Adjustment of redeemable noncontrolling interests to redemption value	(7)	(7)						(7)
Shares, outstanding, ending balance (in shares) at Sep. 30, 2025			900,000	709,000,000
Balance at the end of the year at Sep. 30, 2025	$ 24,210	$ 23,309	$ 1	$ 287	$ (2,027)	$ 361	$ (381)	$ 25,068	$ 901
Treasury stock, common, shares ending balance (in shares) at Sep. 30, 2025	(38,581,568)				(38,600,000)