Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets by Asset Class (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Sep. 30, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,657	$ 2,220
Accumulated Amortization and Impairment	2,210	1,968
Total	447	252
Held-for-sale
Finite-Lived Intangible Assets [Line Items]
Gross intangibles held for sale		143
Customer-related and contract-based
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,207	1,851
Accumulated Amortization and Impairment	1,833	1,653
Total	374	198
Technology and other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	450	369
Accumulated Amortization and Impairment	377	315
Total	73	$ 54
Tradenames
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	$ 14