Derivatives and Hedging Activities - Gains and Losses (Details) - Interest Rate Contract - Fair Value Hedges - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]
Fixed-rate long-term debt	$ 370	$ (137)	$ 592	$ (400)
Derivatives designated as hedging instruments	(370)	137	(592)	400
Total	$ 0	$ 0	$ 0	$ 0

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.

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+ Details