Derivatives (Cash Flow Hedges) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net	$ 1	$ (2)
Maximum Length of Time Hedged in Cash Flow Hedge	6 years		6 years
Accumulated Other Comprehensive Income Loss	$ 2,200		$ 2,000