Accounting for Derivative Instruments and Hedging Activities - Schedule of Fair Value Within the Derivative Instrument Valuation on the Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Derivative [Line Items]
Derivative Assets	$ 156	$ 175
Derivative Liabilities	360	371
Derivatives Designated as Cash Flow Hedges:
Derivative [Line Items]
Derivative Assets	31	27
Derivative Liabilities	27	0
Derivatives Not Designated as Cash Flow Hedges:
Derivative [Line Items]
Derivative Assets	125	148
Derivative Liabilities	333	371
Interest rate contracts current | Derivatives Designated as Cash Flow Hedges:
Derivative [Line Items]
Derivative Assets	2	5
Derivative Liabilities	6	0
Interest rate contracts current | Derivatives Not Designated as Cash Flow Hedges:
Derivative [Line Items]
Derivative Assets	17	30
Derivative Liabilities	0	0
Interest rate contracts long-term | Derivatives Designated as Cash Flow Hedges:
Derivative [Line Items]
Derivative Assets	29	22
Derivative Liabilities	21	0
Interest rate contracts long-term | Derivatives Not Designated as Cash Flow Hedges:
Derivative [Line Items]
Derivative Assets	94	109
Derivative Liabilities	0	0
Energy-related commodity contracts current | Derivatives Not Designated as Cash Flow Hedges:
Derivative [Line Items]
Derivative Assets	10	4
Derivative Liabilities	46	56
Energy-related commodity contracts long-term | Derivatives Not Designated as Cash Flow Hedges:
Derivative [Line Items]
Derivative Assets	4	5
Derivative Liabilities	$ 287	$ 315