Financial Risk Management Activities - Notional Amounts of Outstanding Financial Risk Management Derivative Contracts (Detail) MMBbls in Millions, $ in Millions	Jun. 30, 2023 USD ($) MMBbls	Dec. 31, 2022 USD ($) MMBbls
Commodity Options / Collars
Derivative [Line Items]
Commodity - crude oil \| MMBbls	23.9	0.0
Foreign Exchange Forwards / Swaps
Derivative [Line Items]
Outstanding gross notional amount	$ 236	$ 177
Interest Rate Swaps
Derivative [Line Items]
Outstanding gross notional amount	$ 100	$ 100

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