Fair Value Measurements - Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Investments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 0
Purchases	21
Ending balance	21	$ 0
Contingent consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	87	174
Acquisitions (including assumed balances)	0	1
Payments	(2)	(63)
Changes in fair value included in earnings	(73)	(25)
Ending balance	$ 13	$ 87
Fair Value, Recurring Basis, Unobservable Input Reconciliation, Liability, Gain (Loss), Statement of Income [Extensible Enumeration]	Selling, general and administrative expenses	Selling, general and administrative expenses