Financial Instruments (Fair Values Of Derivatives Instruments) (Detail) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Derivative Assets	$ 59	$ 20
Fair Value, Derivative Liabilities	64	52
Derivatives designated as hedging instruments | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Derivative Assets	24	2
Fair Value, Derivative Liabilities	9	27
Derivatives not designated as hedging instruments | Foreign exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Derivative Assets	5	7
Fair Value, Derivative Liabilities	7	10
Derivatives not designated as hedging instruments | Interest rate caps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Derivative Assets	30	11
Fair Value, Derivative Liabilities	$ 48	$ 15