Employee Benefit Plans - Schedule of Pension Plan Assets at Fair Value (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 7	$ 8	$ 8
Recurring
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	67	72
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	60	64
Recurring | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	7	8
Recurring | Money market funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value		1
Recurring | Money market funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value		0
Recurring | Money market funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value		1
Recurring | Money market funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value		0
Recurring | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	22	25
Recurring | Equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Equity securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	22	25
Recurring | Equity securities | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Bond/fixed-income funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	36	32
Recurring | Bond/fixed-income funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Bond/fixed-income funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	36	32
Recurring | Bond/fixed-income funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Real estate
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	2	6
Recurring | Real estate | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Real estate | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	2	6
Recurring | Real estate | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	7	8
Recurring | Insurance contracts | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Insurance contracts | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Recurring | Insurance contracts | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 7	$ 8