Derivative Instruments (Maturity Of The Notional Amounts Of Derivative Financial Instruments) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 178,145
Remaining Life - 1 - 5 Years	59,503
Remaining Life - 6 - 10 Years	30,658
Remaining Life - 11 - 30 Years	22,923
Remaining Life - Over 30 Years	13,910
Remaining Life - Total Years	305,139
Interest Rate Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	19,876
Remaining Life - 1 - 5 Years	19,738
Remaining Life - 6 - 10 Years	21,449
Remaining Life - 11 - 30 Years	20,802
Remaining Life - Over 30 Years	3,000
Remaining Life - Total Years	$ 84,865
Derivative maturity date	Dec. 18, 2024
Foreign Currency Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 220
Remaining Life - 1 - 5 Years	767
Remaining Life - 6 - 10 Years	1,622
Remaining Life - 11 - 30 Years	2,112
Remaining Life - Over 30 Years	42
Remaining Life - Total Years	$ 4,763
Derivative maturity date	Jun. 16, 2061
Equity Market Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	$ 158,036
Remaining Life - 1 - 5 Years	38,948
Remaining Life - 6 - 10 Years	7,515
Remaining Life - 11 - 30 Years	9
Remaining Life - Over 30 Years	10,868
Remaining Life - Total Years	215,376
Commodity [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	13
Remaining Life - Total Years	13
Credit Contracts [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life - 1 - 5 Years	50
Remaining Life - 6 - 10 Years	72
Remaining Life - Total Years	$ 122