Goodwill and Other Intangible Assets - Schedule of other intangible assets by asset class (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,710	$ 2,786
Accumulated Amortization and Impairment	2,218	2,146
Net Carrying Amount	492	640
Amortization and impairment of intangible assets	147	246	$ 392
Customer-related and contract-based
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,289	2,337
Accumulated Amortization and Impairment	1,848	1,775
Net Carrying Amount	441	562
Technology and other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	407	435
Accumulated Amortization and Impairment	357	358
Net Carrying Amount	50	77
Tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	14	14
Accumulated Amortization and Impairment	13	13
Net Carrying Amount	$ 1	1
Impairment of intangible assets		$ 1,000