Financial Instruments (Fair Values Of Derivatives Instruments) (Detail) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	$ 100	$ 111
Fair Value, Derivative Liabilities	99	117
Derivatives designated as hedging instruments | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	52	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	3	4
Fair Value, Derivative Liabilities	1	6
Derivatives not designated as hedging instruments | Interest rate caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset Derivatives	45	46
Fair Value, Derivative Liabilities	$ 98	$ 111