Goodwill and Other Intangibles (Amortized Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 4,728	$ 4,353
Accumulated Amortization	2,098	1,816
Net Carrying Amount	2,630	2,537
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Cost	4,337	3,993
Accumulated Amortization	1,761	1,508
Net Carrying Amount	2,576	2,485
Other
Finite-Lived Intangible Assets [Line Items]
Gross Cost	391	360
Accumulated Amortization	337	308
Net Carrying Amount	$ 54	$ 52