Leases (Schedule of Maturity Analysis of Operating and Finance Lease Liabilities) (Detail) $ in Millions	Dec. 31, 2023 USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
Maturity of operating lease liabilities, 2024	$ 3
Maturity of operating lease liabilities, 2025	2
Maturity of operating lease liabilities, 2026	2
Maturity of operating lease liabilities, 2027	2
Maturity of operating lease liabilities, 2028	1
Maturity of operating lease liabilities, after 2028	19
Maturity of operating lease liabilities, total undiscounted lease payments	29
Operating lease liabilities, present value adjustment	(10)
Present value of operating lease liabilities	19
Finance Lease Liabilities, Payments, Due [Abstract]
Maturity of finance lease liabilities, 2024	3
Maturity of finance lease liabilities, 2025	2
Maturity of finance lease liabilities, 2026	1
Maturity of finance lease liabilities, 2027	0
Maturity of finance lease liabilities, 2028	0
Maturity of finance lease liabilities, after 2028	0
Maturity of finance lease liabilities, total undiscounted lease payments	6
Finance lease liabilities, present value adjustment	1
Present value of finance lease liabilities	$ 7