Derivatives (Cash Flow Hedges) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net	$ 2	$ 4	$ 14	$ (6)
Accumulated Other Comprehensive Income Loss	$ (1,900)		$ (1,900)		$ 357
Derivatives in cash flow hedging relationships
Maximum Length of Time Hedged in Cash Flow Hedge			4 years		4 years