Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets by Asset Class (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Oct. 30, 2025
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 8,823	$ 9,172
Accumulated Amortization and Impairment	3,096	2,429
Total	5,727	6,743
Amortization and impairment of intangible assets	778	503	$ 89
Disposed of by Sale | NFP Acquisition
Finite-Lived Intangible Assets [Line Items]
Intangible assets				$ 760
Customer-related and contract-based
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,738	7,994
Accumulated Amortization and Impairment	2,644	2,050
Total	5,094	5,944
Tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	716	812
Accumulated Amortization and Impairment	121	66
Total	595	746
Technology and other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	369	366
Accumulated Amortization and Impairment	331	313
Total	$ 38	$ 53