Goodwill and Other Intangible Assets - Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 2,746
Goodwill, Acquired During Period	38
Transfers/Adjustments(a)	(7)
Other	(15)	[1]
Ending Balance	2,762
United States (U.S.)
Goodwill [Roll Forward]
Beginning Balance	1,485
Goodwill, Acquired During Period	24
Transfers/Adjustments(a)	27
Other	(2)	[1]
Ending Balance	1,534
International
Goodwill [Roll Forward]
Beginning Balance	1,261
Goodwill, Acquired During Period	14
Transfers/Adjustments(a)	(34)
Other	(13)	[1]
Ending Balance	$ 1,228

[1] Includes adjustments for foreign currency translation and the sale of a majority interest in our pet insurance business within our U.S. segment.