Acquisitions - Narrative (Details) $ in Millions		3 Months Ended
	Feb. 09, 2024 USD ($)	Mar. 31, 2024 USD ($) acquisition	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Business Acquisition [Line Items]
Total outflow in the Condensed Consolidated Statements of Cash Flows		$ 2,206	$ 155
Goodwill		10,125	9,308	$ 9,158	$ 9,199
Business acquisition, goodwill, expected tax deductible amount		$ 980
Acquired finite-lived intangible assets, weighted average useful life		8 years
Acquisition-related costs		$ 20	2
Other acquisitions
Business Acquisition [Line Items]
Total consideration		$ 102
Number of businesses acquired | acquisition		8
Total outflow in the Condensed Consolidated Statements of Cash Flows		$ 100
Intangible assets, net		18
Goodwill		56
Acquisition-related costs		0	2
Hunter
Business Acquisition [Line Items]
Total consideration	$ 2,106	2,106
Total outflow in the Condensed Consolidated Statements of Cash Flows		2,106
Intangible assets, net		2
Goodwill		969
Acquisition-related costs		$ 20	$ 0