Financial Risk Management Activities - Derivative Contracts - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Outstanding gross notional amount	$ 100,000,000		$ 100,000,000		$ 100,000,000
Foreign Exchange Forwards / Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Outstanding gross notional amount	157,000,000		157,000,000		145,000,000
Derivative Contracts Designated as Hedging Instruments: | Commodity Options / Collars | Designated as Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(163,000,000)	$ (64,000,000)	(255,000,000)	$ (115,000,000)
Pre-tax deferred income (losses) in Accumulated other comprehensive income (loss) to be reclassified into earnings within the next twelve months			(306,000,000)
Deferred losses in Accumulated other comprehensive income (loss) related to outstanding crude oil hedging contracts, net of tax			(306,000,000)
Derivative Contracts Designated as Hedging Instruments: | Interest Rate Swaps | Designated as Fair Value Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Outstanding gross notional amount	100,000,000		100,000,000		$ 100,000,000
Unrealized change in fair value of interest rate swaps - (increase in derivative asset) decrease in derivative liability	(1,000,000)	0	(5,000,000)	(1,000,000)
Derivative Contracts Not Designated as Hedging Instruments: | Foreign Exchange Forwards / Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange gains (losses) reported in Other, net in the Statement of Consolidated Income	(3,000,000)	(1,000,000)	(3,000,000)	(2,000,000)
Net gains (losses) on foreign exchange contracts not designated as hedging instruments	$ 10,000,000	$ 1,000,000	$ 14,000,000	$ 0