Retirement Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Settlement loss		$ (9)	$ 0	$ (93)
Budgeted contributions to funded pension plans for next year		45
Expense for defined contribution plans		$ 18	22	20
Scenario Forecast
Defined Benefit Plan Disclosure [Line Items]
Service costs	$ 50
Net non-service pension costs	135
Interest costs	65
Amortization of unrecognized net actuarial losses	15
Expected return on plan assets	$ 215
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Current target allocations for plan assets		45.00%
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Current target allocations for plan assets		35.00%
Other Types of Investments
Defined Benefit Plan Disclosure [Line Items]
Current target allocations for plan assets		20.00%
Funded Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Single premium annuity contract cost				249
Settlement loss				$ 88
Service costs		$ 41	37
Interest costs		$ 52	$ 68