Goodwill and Other Intangibles (Amortized Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 4,431	$ 4,099
Accumulated Amortization	1,621	1,400
Net Carrying Amount	2,810	2,699
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Cost	4,066	3,713
Accumulated Amortization	1,334	1,170
Net Carrying Amount	2,732	2,543
Other
Finite-Lived Intangible Assets [Line Items]
Gross Cost	365	386
Accumulated Amortization	287	230
Net Carrying Amount	$ 78	$ 156