Other Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 4,187	$ 3,851
Acquisitions	590	394
Dispositions	0	(27)
Other	95	(31)
Goodwill, ending balance	4,872	4,187
USCS
Goodwill [Roll Forward]
Goodwill, beginning balance	772	379
Acquisitions	0	394
Dispositions	0	0
Other	27	(1)
Goodwill, ending balance	799	772
CS
Goodwill [Roll Forward]
Goodwill, beginning balance	2,148	2,151
Acquisitions	590	0
Dispositions	0	0
Other	6	(3)
Goodwill, ending balance	2,744	2,148
ICS
Goodwill [Roll Forward]
Goodwill, beginning balance	716	743
Acquisitions	0	0
Dispositions	0	0
Other	59	(27)
Goodwill, ending balance	775	716
GMNS
Goodwill [Roll Forward]
Goodwill, beginning balance	551	578
Acquisitions	0	0
Dispositions	0	(27)
Other	3	0
Goodwill, ending balance	$ 554	$ 551