Derivative Financial Instruments - Summary of Interest Rate Hedge Balances (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Mark-to-market derivative liabilities (current liabilities)	$ (29)	$ (74)
Mark-to-market derivative liabilities (noncurrent liabilities)	(103)	(106)
Total mark-to-market derivative net assets	(21)	51
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Other current assets		11
Interest Rate Contract
Derivative [Line Items]
Other current assets	14	12
Other deferred debits (noncurrent assets)	12
Total derivative assets	26	12
Mark-to-market derivative liabilities (current liabilities)	(1)	(46)
Total mark-to-market derivative liabilities	(1)	(46)
Total mark-to-market derivative net assets	25	(34)
Interest Rate Contract | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Other current assets	14
Other deferred debits (noncurrent assets)	12
Total derivative assets	26	11
Mark-to-market derivative liabilities (current liabilities)	(1)	(24)
Total mark-to-market derivative liabilities	(1)	(24)
Total mark-to-market derivative net assets	25	(13)
Interest Rate Contract | Not Designated as Hedging Instrument
Derivative [Line Items]
Other current assets	0	1
Other deferred debits (noncurrent assets)	0
Total derivative assets	0	1
Mark-to-market derivative liabilities (current liabilities)	0	(22)
Total mark-to-market derivative liabilities	0	(22)
Total mark-to-market derivative net assets	$ 0	$ (21)