Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Line Items]
Goodwill - gross	$ 6,845	$ 6,783	$ 6,832
Accumulated impairments	(3,410)	(3,410)	(3,410)
Goodwill [Roll Forward]
Net goodwill, beginning balance	3,373	3,422
Increase (decrease) due to:
Dispositions		(22)
Foreign exchange and other	62	(27)
Net goodwill, ending balance	3,435	3,373
Other Operations
Goodwill [Line Items]
Goodwill - gross	17	17	17
Accumulated impairments	(10)	(10)	(10)
Goodwill [Roll Forward]
Net goodwill, beginning balance	7	7
Increase (decrease) due to:
Dispositions		0
Foreign exchange and other	0	0
Net goodwill, ending balance	7	7
North America Commercial | Reportable Segments
Goodwill [Line Items]
Goodwill - gross	4,285	4,285	4,285
Accumulated impairments	(2,216)	(2,216)	(2,216)
Goodwill [Roll Forward]
Net goodwill, beginning balance	2,069	2,069
Increase (decrease) due to:
Dispositions		0
Foreign exchange and other	0	0
Net goodwill, ending balance	2,069	2,069
International Commercial | Reportable Segments
Goodwill [Line Items]
Goodwill - gross	2,061	2,003	2,028
Accumulated impairments	(947)	(947)	(947)
Goodwill [Roll Forward]
Net goodwill, beginning balance	1,056	1,081
Increase (decrease) due to:
Dispositions		0
Foreign exchange and other	58	(25)
Net goodwill, ending balance	1,114	1,056
Global Personal | Reportable Segments
Goodwill [Line Items]
Goodwill - gross	482	478	502
Accumulated impairments	(237)	(237)	$ (237)
Goodwill [Roll Forward]
Net goodwill, beginning balance	241	265
Increase (decrease) due to:
Dispositions		(22)
Foreign exchange and other	4	(2)
Net goodwill, ending balance	$ 245	$ 241