Fair Value of Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment charges	$ 0	$ 0	$ 0	$ 0
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits held in money market mutual funds	19		19		$ 17
Foreign exchange contracts	0		0		0
Total	19		19		17
Interest rate swap agreements	0		0
Foreign exchange contracts	0		0		0
Total	0		0		0
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest Rate Cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements					0
Fair Value, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits held in money market mutual funds	0		0		0
Foreign exchange contracts	1		1		1
Total	1		1		19
Interest rate swap agreements	14		14
Foreign exchange contracts	1		1		1
Total	15		15		1
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Interest Rate Cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements					18
Fair Value, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits held in money market mutual funds	0		0		0
Foreign exchange contracts	0		0		0
Total	0		0		0
Interest rate swap agreements	0		0
Foreign exchange contracts	0		0		0
Total	0		0		0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Interest Rate Cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements					0
Fair Value, Recurring | Total
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deposits held in money market mutual funds	19		19		17
Foreign exchange contracts	1		1		1
Total	20		20		36
Interest rate swap agreements	14		14
Foreign exchange contracts	1		1		1
Total	$ 15		$ 15		1
Fair Value, Recurring | Total | Interest Rate Cap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements					$ 18