Financial Instruments (Fair Values of Derivatives Instruments) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	$ 128	$ 111
Fair Value, Derivative Liabilities	145	117
Derivatives designated as hedging instruments | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	69	61
Fair Value, Derivative Liabilities	0	0
Derivatives not designated as hedging instruments | Foreign exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	2	4
Fair Value, Derivative Liabilities	3	6
Derivatives not designated as hedging instruments | Interest rate caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	57	46
Fair Value, Derivative Liabilities	$ 142	$ 111