Derivatives - Notional and Fair Values (Details) MMBTU in Thousands, Boe in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($) MMBTU Boe company	Dec. 31, 2022 USD ($) MMBTU Boe company
Derivative Assets
Derivative assets - Fair value	$ 765,161,000	$ 755,328,000
Less: Master Netting Arrangements	(208,183,000)	(242,745,000)
Less: Cash collateral received	(264,245,000)	(372,038,000)
Net derivative assets	292,733,000	140,545,000
Derivative Liabilities
Gross amounts recognized	811,725,000	887,264,000
Less: Master Netting Arrangements	(208,183,000)	(242,745,000)
Amount used to offset against derivative liabilities	0	0
Net derivative liabilities	$ 603,542,000	$ 644,519,000
Crude oil
Derivative Liabilities
Derivative, nonmonetary notional amount, energy measure | Boe	16,446	12,005
Natural gas
Derivative Liabilities
Derivative, nonmonetary notional amount, energy measure | MMBTU	306,161	247,704
Derivative instruments designated as hedging instruments
Derivative Instruments
Notional amount	$ 5,331,480,000	$ 3,534,832,000
Derivative Assets
Derivative assets - Fair value	6,076,000	19,045,000
Derivative Liabilities
Gross amounts recognized	51,862,000	19,687,000
Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	22,719,879,000	20,056,255,000
Derivative Assets
Derivative assets - Fair value	759,085,000	736,283,000
Derivative Liabilities
Gross amounts recognized	759,863,000	867,577,000
Interest rate contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	17,885,894,000	16,932,414,000
Derivative Assets
Derivative assets - Fair value	527,805,000	426,828,000
Derivative Liabilities
Gross amounts recognized	539,585,000	564,829,000
Interest rate contracts | Cash Flow Hedging | Derivative instruments designated as hedging instruments
Derivative Instruments
Notional amount	5,250,000,000	3,450,000,000
Derivative Assets
Derivative assets - Fair value	2,430,000	13,455,000
Derivative Liabilities
Gross amounts recognized	51,862,000	19,687,000
Foreign exchange contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	4,724,615,000	2,982,891,000
Derivative Assets
Derivative assets - Fair value	91,936,000	47,519,000
Derivative Liabilities
Gross amounts recognized	72,342,000	44,117,000
Foreign exchange contracts | Net Investment Hedging | Derivative instruments designated as hedging instruments
Derivative Instruments
Notional amount	81,480,000	84,832,000
Derivative Assets
Derivative assets - Fair value	3,646,000	5,590,000
Derivative Liabilities
Gross amounts recognized	0	0
Commodity contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	0	0
Derivative Assets
Derivative assets - Fair value	139,081,000	261,613,000
Derivative Liabilities
Gross amounts recognized	147,920,000	258,608,000
Credit contracts (2) | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	109,370,000	140,950,000
Derivative Assets
Derivative assets - Fair value	0	0
Derivative Liabilities
Gross amounts recognized	16,000	23,000
Equity contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	0	0
Derivative Assets
Derivative assets - Fair value	263,000	323,000
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	10	13