Derivative Instruments and Hedging Activities - Commodity Purchases (Details) - Not Designated As Hedging Instruments [Member] - USD ($) $ in Millions |
Sep. 30, 2023 |
Dec. 31, 2022 |
---|---|---|
Commodity Purchases [Line Items] | ||
Liability value | $ 37 | $ 73 |
Asset value | 0 | 25 |
Current Assets [Member] | ||
Commodity Purchases [Line Items] | ||
Asset value | 0 | 20 |
Current Assets [Member] | Gas Contract | ||
Commodity Purchases [Line Items] | ||
Asset value | 0 | 20 |
Current Liabilities [Member] | ||
Commodity Purchases [Line Items] | ||
Liability value | 29 | 63 |
Current Liabilities [Member] | Gas Contract | ||
Commodity Purchases [Line Items] | ||
Liability value | 29 | 62 |
Noncurrent Assets [Member] | ||
Commodity Purchases [Line Items] | ||
Asset value | 0 | 5 |
Noncurrent Assets [Member] | Gas Contract | ||
Commodity Purchases [Line Items] | ||
Asset value | 0 | 5 |
Noncurrent Liabilities [Member] | ||
Commodity Purchases [Line Items] | ||
Liability value | 8 | 10 |
Noncurrent Liabilities [Member] | Gas Contract | ||
Commodity Purchases [Line Items] | ||
Liability value | $ 5 | $ 4 |