Income Taxes - Summary of Operating Loss and Credit Carryovers (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating Loss Carryforwards [Line Items]
Net operating loss carryovers, Tax-Effected	$ 109
Valuation allowance, Operating loss and credit carryovers	98	$ 79
Operating Loss and Credit Carryovers	11
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryovers, Gross	34
Net operating loss carryovers, Tax-Effected	$ 7
Net operating loss, Expiration	2032
Valuation allowance, Operating loss and credit carryovers	$ 1
Operating Loss and Credit Carryovers	6
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryovers, Gross	559
Net operating loss carryovers, Tax-Effected	$ 37
Net operating loss, Expiration	2023
Valuation allowance, Operating loss and credit carryovers	$ 32
Operating Loss and Credit Carryovers	5
State IRC § 163(j) disallowed interest expense carryovers, Gross	4,173
State IRC § 163(j) disallowed interest expense carryovers, Tax-Effected	$ 65
State IRC § 163(j) disallowed interest expense carryovers, Expiration	Indefinite
State IRC § 163(j) disallowed interest expense carryovers, Corresponding Valuation Allowance	$ 65
State IRC § 163(j) disallowed interest expense carryovers, Operating Loss and Credit carryovers	$ 0