Acquisitions - Narrative (Details) $ in Millions				12 Months Ended
	Jul. 01, 2024 USD ($)	Feb. 09, 2024 USD ($)	Jul. 08, 2022 USD ($)	Dec. 31, 2024 USD ($) acquisition	Dec. 31, 2023 USD ($) acquisition	Dec. 31, 2022 USD ($) acquisition
Business Acquisition [Line Items]
Acquisitions, net of cash acquired				$ 4,900	$ 640	$ 3,253
Goodwill				11,061	9,158	9,199
Goodwill expected tax deductible amount				$ 1,712	$ 33	$ 1,289
Intangible assets acquired, weighted average useful life				9 years	6 years	19 years
Revenue of acquiree since acquisition date				$ 1,387	$ 228	$ 761
Net (loss) income attributable to CRH plc				23	15	18
Hunter
Business Acquisition [Line Items]
Acquisitions, net of cash acquired		$ 2,106		2,106
Intangible assets, net				2
Goodwill				977
Adbri
Business Acquisition [Line Items]
Acquisitions, net of cash acquired	$ 787			787
Business acquisition, percentage of voting interests acquired	57.00%
Intangible assets, net				4
Goodwill				227
Other acquisitions
Business Acquisition [Line Items]
Acquisitions, net of cash acquired				$ 2,007	$ 640	$ 1,350
Number of acquisitions | acquisition				38	22	28
Intangible assets, net				$ 184		$ 178
Goodwill				$ 940		546
2023 acquisitions
Business Acquisition [Line Items]
Acquisitions, net of cash acquired					$ 640
Intangible assets, net					86
Goodwill					$ 398
Barrette
Business Acquisition [Line Items]
Acquisitions, net of cash acquired			$ 1,903			1,903
Business acquisition, percentage of voting interests acquired			100.00%
Intangible assets, net						809
Goodwill						774
2022 acquisitions
Business Acquisition [Line Items]
Acquisitions, net of cash acquired						3,253
Intangible assets, net						987
Goodwill						$ 1,320