Employee Benefits - Pension and Other Post-Retirement Benefits (Detail) - Pension Benefits - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of net periodic pension expense (credit):
Interest cost	$ 4,000,000	$ 4,000,000	$ 5,000,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax
Amortization of past-service liability	$ 0	$ 0
Expected return on plan assets	$ (16,000,000)	$ (16,000,000)	$ (15,000,000)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax
Amortization of net actuarial loss	$ 2,000,000	$ 7,000,000	$ 7,000,000
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax
Net periodic pension credit	$ (10,000,000)	$ (5,000,000)	$ (3,000,000)