Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill - gross	$ 6,783	$ 6,832	$ 7,161
Accumulated impairments	(3,410)	(3,410)	(3,410)
Net goodwill	3,373	3,422	3,751
Dispositions	(22)	(369)
Other	(27)	40
Other Operations
Goodwill [Roll Forward]
Goodwill - gross	17	17	19
Accumulated impairments	(10)	(10)	(10)
Net goodwill	7	7	9
Dispositions	0	0
Other	0	(2)
North America Commercial | Reportable Segments
Goodwill [Roll Forward]
Goodwill - gross	4,285	4,285	4,654
Accumulated impairments	(2,216)	(2,216)	(2,216)
Net goodwill	2,069	2,069	2,438
Dispositions	0	(369)
Other	0	0
International Commercial | Reportable Segments
Goodwill [Roll Forward]
Goodwill - gross	2,003	2,028	1,989
Accumulated impairments	(947)	(947)	(947)
Net goodwill	1,056	1,081	1,042
Dispositions	0	0
Other	(25)	39
Global Personal | Reportable Segments
Goodwill [Roll Forward]
Goodwill - gross	478	502	499
Accumulated impairments	(237)	(237)	(237)
Net goodwill	241	265	$ 262
Dispositions	(22)	0
Other	$ (2)	$ 3