Fair Value of Financial Assets and Liabilities - Impact of Derivative Activities on Income (Details) $ in Millions	3 Months Ended
Mar. 31, 2023 USD ($)
Other Derivative Instruments \| Natural Gas Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax fair value gains (losses) recognized during the period in regulatory (assets) and liabilities	$ 1

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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