Financial Instruments (Fair Values of Derivatives Instruments) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	$ 39	$ 49
Fair Value, Liability Derivatives	12	22
Derivatives designated as hedging instruments | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	32	41
Fair Value, Liability Derivatives	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, Liability Derivatives	9	10
Derivatives not designated as hedging instruments | Interest rate caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	3	3
Fair Value, Liability Derivatives	$ 3	$ 12