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	$ 178,453
Remaining Life - 1 - 5 Years	59,503
Remaining Life - 6 - 10 Years	30,658
Remaining Life - 11 - 30 Years	23,554
Remaining Life Over - 30 Years	15,123
Remaining Life - Total Years	307,291
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	21,433
Remaining Life Over - 30 Years	4,213
Remaining Life - Total Years	$ 86,709
Derivative maturity date	Apr. 20, 2067
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	$ 158,344
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	215,684
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
Commodity Contract [Member]
Maturity of the notional amounts of derivative financial instruments
Remaining Life Less Than 1 Year	13
Remaining Life - Total Years	$ 13