Financial Instruments - Fair Value (Level 2) of Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset  Derivatives	$ 20	$ 3
Fair Value, Liability  Derivatives	52	80
Interest rate swaps | Derivatives designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset  Derivatives	2	0
Fair Value, Liability  Derivatives	27	69
Foreign exchange contracts | Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset  Derivatives	7	3
Fair Value, Liability  Derivatives	10	11
Interest rate caps | Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value, Asset  Derivatives	11	0
Fair Value, Liability  Derivatives	$ 15	$ 0