Financial Instruments (Fair Values of Derivatives Instruments) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	$ 70	$ 74
Fair Value, Derivative Liabilities	54	78
Derivatives designated as hedging instruments | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	59	50
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	4	5
Fair Value, Derivative Liabilities	6	4
Derivatives not designated as hedging instruments | Interest rate caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	7	19
Fair Value, Derivative Liabilities	$ 48	$ 74