Derivatives (Notional and Fair Values) (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2021 USD ($) MMBTU Boe company	Dec. 31, 2020 USD ($) Boe MMBTU company
Derivative Asset [Abstract]
Derivative assets - Fair value	$ 484,184	$ 602,754
Less: Master Netting Arrangements	(58,679)	(93,063)
Less: Cash collateral received or paid	(42,274)	(8,449)
Derivative asset, after netting	383,231	501,242
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	390,171	424,828
Less: Master Netting Arrangements	(58,679)	(93,063)
Less: Cash collateral received/paid	(174,048)	(91,634)
Derivative liability, after netting	$ 157,444	$ 240,131
Customer Counterparty \| Crude Oil
Derivative Liability [Abstract]
Derivative, nonmonetary notional amount, energy measure \| Boe	7,519	6,321
Customer Counterparty \| Natural Gas
Derivative Liability [Abstract]
Derivative, nonmonetary notional amount, energy measure \| MMBTU	83,274	109,635
Derivative instruments designated as hedging instruments
Derivative Instruments
Notional Amount	$ 361,531	$ 359,269
Derivative Asset [Abstract]
Derivative assets - Fair value	0	0
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	282	2,099
Derivative instruments designated as hedging instruments \| Interest rate contracts \| Cash Flow Hedging
Derivative Instruments
Notional Amount	275,000	275,000
Derivative Asset [Abstract]
Derivative assets - Fair value	0	0
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	57	1,864
Derivative instruments designated as hedging instruments \| Foreign exchange contracts \| Net investment hedges
Derivative Instruments
Notional Amount	86,531	84,269
Derivative Asset [Abstract]
Derivative assets - Fair value	0	0
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	225	235
Derivative instruments not designated as hedging instruments
Derivative Instruments
Notional Amount	19,522,661	21,341,158
Derivative Asset [Abstract]
Derivative assets - Fair value	484,184	602,754
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	389,889	422,729
Derivative instruments not designated as hedging instruments \| Interest rate contracts
Derivative Instruments
Notional Amount	17,575,420	18,155,678
Derivative Asset [Abstract]
Derivative assets - Fair value	240,222	489,132
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	179,905	315,834
Derivative instruments not designated as hedging instruments \| Foreign exchange contracts
Derivative Instruments
Notional Amount	1,874,681	3,108,488
Derivative Asset [Abstract]
Derivative assets - Fair value	21,033	30,300
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	15,276	22,524
Derivative instruments not designated as hedging instruments \| Credit contracts
Derivative Instruments
Notional Amount	72,560	76,992
Derivative Asset [Abstract]
Derivative assets - Fair value	0	13
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	141	206
Derivative instruments not designated as hedging instruments \| Equity contracts
Derivative Instruments
Notional Amount	0	0
Derivative Asset [Abstract]
Derivative assets - Fair value	220	858
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	0	0
Derivative instruments not designated as hedging instruments \| Commodity contracts
Derivative Instruments
Notional Amount	0	0
Derivative Asset [Abstract]
Derivative assets - Fair value	222,709	82,451
Derivative Liability [Abstract]
Derivative liabilities - Fair Value	$ 194,567	$ 84,165
Derivative instruments not designated as hedging instruments \| Equity, Public Companies
Derivative Liability [Abstract]
Number of companies that Issued the equity contracts (Issuers Portion Only) \| company	1	2
Derivative instruments not designated as hedging instruments \| Equity, Private Companies
Derivative Liability [Abstract]
Number of companies that Issued the equity contracts (Issuers Portion Only) \| company	12	17

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