Business Combinations - Additions, Payments, and Net Changes, as well as Interest Expense Accretion on Estimated Acquisition Earn-Out Payables (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Business Combinations [Abstract]
Beginning balance	$ 249	$ 252
Additions to estimated acquisition earn-out payables	9	20
Payments for estimated acquisition earn-out payables	(52)	(16)
Subtotal	206	256
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	(4)	(4)
Interest expense accretion	2	2
Net change in earnings from estimated acquisition earn-out payables	(2)	(2)
Foreign currency translation adjustments during the year	(1)	1
Ending balance	$ 203	$ 255