Fair Value of Financial Assets and Liabilities - Commodity Derivatives (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Cash Flow Hedges
Derivative [Line Items]
Derivative Instruments in Hedges, at Fair Value, Net	$ 0
Natural Gas Commodity | Fair Value, Recurring [Member] | Other Derivative Instruments
Derivative [Line Items]
Derivative Asset, Net	$ 0	$ 2	[1]
Natural Gas Commodity | Fair Value, Recurring [Member] | Other Derivative Instruments | Prepaid Expenses and Other Current Assets
Derivative [Line Items]
Derivative Asset, Net		$ 2

[1] $2 million included in prepayments and other current assets and $1 million included in other current liabilities at Dec. 31, 2022 on the consolidated balance sheet.