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Fair Value Measurements - Schedule of Reconciliation for Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Investment in Unconsolidated Subsidiaries
Investment in Unconsolidated Subsidiaries
Beginning balance	$ 477	$ 461
Transfer in (out)	0	0
Net change in fair value	(65)	16
Purchases/ Additions	0	0
Sales / Payments	0	0
Ending balance	412	477
Other Assets
Other Assets
Beginning balance	16	14
Transfer in (out)	0	(10)
Net change in fair value	18	5
Purchases/ Additions	12	7
Sales / Payments	0	0
Ending balance	46	16
Contingent Consideration
Other Assets
Beginning balance	36	41
Transfer in (out)	0	0
Net change in fair value	(5)	(6)
Purchases/ Additions	11	20
Sales / Payments	(6)	(19)
Ending balance	$ 36	$ 36

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Amount of transfers of financial instrument classified as a liability into (out of) level 3 of the fair value hierarchy.

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