Acquisitions (Narrative) (Details) £ in Millions, $ in Millions		12 Months Ended
	Dec. 06, 2023 USD ($)	Dec. 31, 2024 USD ($) business segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) business segment	Dec. 31, 2022 GBP (£) business segment
Business Acquisition [Line Items]
Net cash consideration		$ 558	$ 5,610	$ 582
Number of segments | segment		3		3	3
Goodwill		$ 40,497	41,608	$ 37,276
Other Business Acquisitions
Business Acquisition [Line Items]
Number of businesses acquired | business		3		7	7
Net cash consideration		$ 558		$ 582
Goodwill		305		$ 389
Abcam
Business Acquisition [Line Items]
Net cash consideration	$ 5,600
Goodwill	$ 3,900
Revenue reported by acquired entity for last annual period | £					£ 362
Transaction costs			27
Fair value adjustment to inventory | Abcam
Business Acquisition [Line Items]
Net income (loss), including portion attributable to noncontrolling interest		$ 25
Fair value adjustment to inventory and settlement of share-based payment awards | Abcam
Business Acquisition [Line Items]
Net income (loss), including portion attributable to noncontrolling interest			$ 68