Financial Instruments - Energy segments derivatives (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Collateral for derivative positions	$ 13	$ 7
Energy Segment
Derivative [Line Items]
Liability derivatives, Gross	2	1
Commodity Contract \| Energy Segment
Derivative [Line Items]
Asset derivatives, Gross	29
Liability derivatives, Gross	$ (3)	$ (5)

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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