v3.26.1
Derivatives (Cash Flow Hedges) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net $ 4 $ 12  
Accumulated Other Comprehensive Income Loss $ (1,400)   $ (2,100)
Derivatives in cash flow hedging relationships      
Maximum Length of Time Hedged in Cash Flow Hedge 3 years   3 years