Derivatives - Notional and Fair Values (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) MMBTU Boe company	Dec. 31, 2022 USD ($) Boe MMBTU company
Derivative Assets
Derivative assets - Fair value	$ 627,402	$ 755,328
Less: Master Netting Arrangements	(169,849)	(242,745)
Less: Cash collateral received	(195,278)	(372,038)
Net derivative assets	262,275	140,545
Derivative Liabilities
Gross amounts recognized	681,830	887,264
Less: Master Netting Arrangements	(169,849)	(242,745)
Amount used to offset against derivative liabilities	0	0
Net derivative liabilities	$ 511,981	$ 644,519
Crude oil
Derivative Liabilities
Derivative, nonmonetary notional amount, energy measure | Boe	24,954	12,005
Natural gas
Derivative Liabilities
Derivative, nonmonetary notional amount, energy measure | MMBTU	266,047	247,704
Derivative instruments designated as hedging instruments
Derivative Instruments
Notional amount	$ 3,331,480	$ 3,534,832
Derivative Assets
Derivative assets - Fair value	27,535	19,045
Derivative Liabilities
Gross amounts recognized	4,114	19,687
Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	21,565,085	20,056,255
Derivative Assets
Derivative assets - Fair value	599,867	736,283
Derivative Liabilities
Gross amounts recognized	677,716	867,577
Interest rate contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	17,568,116	16,932,414
Derivative Assets
Derivative assets - Fair value	387,465	426,828
Derivative Liabilities
Gross amounts recognized	458,550	564,829
Interest rate contracts | Cash Flow Hedging | Derivative instruments designated as hedging instruments
Derivative Instruments
Notional amount	3,250,000	3,450,000
Derivative Assets
Derivative assets - Fair value	27,535	13,455
Derivative Liabilities
Gross amounts recognized	3,861	19,687
Foreign exchange contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	3,887,403	2,982,891
Derivative Assets
Derivative assets - Fair value	34,050	47,519
Derivative Liabilities
Gross amounts recognized	32,538	44,117
Foreign exchange contracts | Net Investment Hedging | Derivative instruments designated as hedging instruments
Derivative Instruments
Notional amount	81,480	84,832
Derivative Assets
Derivative assets - Fair value	0	5,590
Derivative Liabilities
Gross amounts recognized	253	0
Commodity contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	0	0
Derivative Assets
Derivative assets - Fair value	178,075	261,613
Derivative Liabilities
Gross amounts recognized	186,599	258,608
Credit contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	109,566	140,950
Derivative Assets
Derivative assets - Fair value	0	0
Derivative Liabilities
Gross amounts recognized	29	23
Equity contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	0	0
Derivative Assets
Derivative assets - Fair value	277	323
Derivative Liabilities
Gross amounts recognized	$ 0	$ 0
Equity, Public Companies | Derivatives not designated as hedging instruments
Derivative Liabilities
Number of companies that issued the equity (issuers portion only) | company	1	1
Equity, Private Companies | Derivatives not designated as hedging instruments
Derivative Liabilities
Number of companies that issued the equity (issuers portion only) | company	11	13