Derivatives - Derivatives Not Designated as Hedging Instruments (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($) MMBTU Boe	Dec. 31, 2022 USD ($) MMBTU Boe
Derivative [Line Items]
Gross amounts recognized	$ 765,161	$ 755,328
Derivative liabilities - Fair value	$ 811,725	$ 887,264
Crude oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	16,446	12,005
Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	306,161	247,704
Customer-related positions:
Derivative [Line Items]
Notional amount	$ 11,245,981	$ 10,158,784
Gross amounts recognized	49,526	27,146
Derivative liabilities - Fair value	572,766	592,060
Other economic hedges:
Derivative [Line Items]
Notional amount	11,364,528	9,756,521
Gross amounts recognized	570,215	447,201
Derivative liabilities - Fair value	39,161	16,886
Interest rate contracts | Customer-related positions:
Derivative [Line Items]
Notional amount	8,818,101	8,420,422
Gross amounts recognized	2,129	1,438
Derivative liabilities - Fair value	536,170	561,547
Interest rate contracts | Other economic hedges:
Derivative [Line Items]
Notional amount	9,067,793	8,511,992
Gross amounts recognized	525,676	425,390
Derivative liabilities - Fair value	3,415	3,282
Interest rate contracts | Swaps | Customer-related positions:
Derivative [Line Items]
Notional amount	6,900,309	6,656,491
Gross amounts recognized	2,117	1,438
Derivative liabilities - Fair value	503,261	521,719
Interest rate contracts | Swaps | Other economic hedges:
Derivative [Line Items]
Notional amount	7,088,622	6,683,828
Gross amounts recognized	491,972	384,201
Derivative liabilities - Fair value	2,707	2,047
Interest rate contracts | Written options | Customer-related positions:
Derivative [Line Items]
Notional amount	1,621,207	1,548,158
Gross amounts recognized	0	0
Derivative liabilities - Fair value	24,166	30,904
Interest rate contracts | Written options | Other economic hedges:
Derivative [Line Items]
Notional amount	30,690	32,117
Gross amounts recognized	0	0
Derivative liabilities - Fair value	696	1,235
Interest rate contracts | Collars and corridors | Customer-related positions:
Derivative [Line Items]
Notional amount	296,585	215,773
Gross amounts recognized	12	0
Derivative liabilities - Fair value	8,743	8,924
Interest rate contracts | Collars and corridors | Other economic hedges:
Derivative [Line Items]
Notional amount	296,585	215,772
Gross amounts recognized	8,777	8,956
Derivative liabilities - Fair value	12	0
Interest rate contracts | Purchased options | Other economic hedges:
Derivative [Line Items]
Notional amount	1,651,896	1,580,275
Gross amounts recognized	24,927	32,233
Derivative liabilities - Fair value	0	0
Foreign exchange contracts | Customer-related positions:
Derivative [Line Items]
Notional amount	2,427,880	1,738,362
Gross amounts recognized	47,397	25,708
Derivative liabilities - Fair value	36,596	30,513
Foreign exchange contracts | Other economic hedges:
Derivative [Line Items]
Notional amount	2,296,735	1,244,529
Gross amounts recognized	44,539	21,811
Derivative liabilities - Fair value	35,746	13,604
Foreign exchange contracts | Swaps | Customer-related positions:
Derivative [Line Items]
Notional amount	888,018	623,143
Gross amounts recognized	17,862	6,629
Derivative liabilities - Fair value	4,767	12,178
Foreign exchange contracts | Swaps | Other economic hedges:
Derivative [Line Items]
Notional amount	2,142,800	1,044,900
Gross amounts recognized	44,451	18,516
Derivative liabilities - Fair value	29,652	11,447
Foreign exchange contracts | Forwards and spot | Customer-related positions:
Derivative [Line Items]
Notional amount	1,410,862	993,588
Gross amounts recognized	23,596	17,009
Derivative liabilities - Fair value	31,829	18,090
Foreign exchange contracts | Forwards and spot | Other economic hedges:
Derivative [Line Items]
Notional amount	24,935	77,998
Gross amounts recognized	88	3,050
Derivative liabilities - Fair value	155	87
Foreign exchange contracts | Other | Customer-related positions:
Derivative [Line Items]
Notional amount	129,000	121,631
Gross amounts recognized	5,939	2,070
Derivative liabilities - Fair value	0	245
Foreign exchange contracts | Other | Other economic hedges:
Derivative [Line Items]
Notional amount	129,000	121,631
Gross amounts recognized	0	245
Derivative liabilities - Fair value	5,939	2,070
Commodity contracts | Customer-related positions:
Derivative [Line Items]
Gross amounts recognized	50,625	171,082
Derivative liabilities - Fair value	$ 98,600	$ 100,333
Commodity contracts | Customer-related positions: | Crude oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	8,191	5,476
Gross amounts recognized	$ 10,930	$ 56,551
Derivative liabilities - Fair value	$ 21,517	$ 8,808
Commodity contracts | Customer-related positions: | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	153,328	124,662
Gross amounts recognized	$ 39,695	$ 114,531
Derivative liabilities - Fair value	77,083	91,525
Commodity contracts | Other economic hedges:
Derivative [Line Items]
Gross amounts recognized	88,456	90,531
Derivative liabilities - Fair value	$ 49,320	$ 158,275
Commodity contracts | Other economic hedges: | Crude oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	8,255	6,529
Gross amounts recognized	$ 21,367	$ 8,313
Derivative liabilities - Fair value	$ 10,470	$ 49,432
Commodity contracts | Other economic hedges: | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	152,833	123,042
Gross amounts recognized	$ 67,089	$ 82,218
Derivative liabilities - Fair value	$ 38,850	$ 108,843
Commodity contracts | Swaps | Customer-related positions: | Crude oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	2,717	2,465
Gross amounts recognized	$ 9,106	$ 39,955
Derivative liabilities - Fair value	$ 14,142	$ 6,178
Commodity contracts | Swaps | Customer-related positions: | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	115,608	92,590
Gross amounts recognized	$ 39,171	$ 112,314
Derivative liabilities - Fair value	$ 59,359	$ 73,208
Commodity contracts | Swaps | Other economic hedges: | Crude oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	2,781	2,587
Gross amounts recognized	$ 14,787	$ 6,935
Derivative liabilities - Fair value	$ 8,770	$ 36,060
Commodity contracts | Swaps | Other economic hedges: | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	115,453	91,900
Gross amounts recognized	$ 50,828	$ 69,767
Derivative liabilities - Fair value	$ 38,326	$ 106,883
Commodity contracts | Written options | Customer-related positions: | Crude oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	0	0
Gross amounts recognized	$ 0	$ 558
Derivative liabilities - Fair value	$ 0	$ 0
Commodity contracts | Written options | Customer-related positions: | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	1,559	0
Gross amounts recognized	$ 0	$ 0
Derivative liabilities - Fair value	$ 179	$ 0
Commodity contracts | Purchased options | Other economic hedges: | Crude oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	0	0
Gross amounts recognized	$ 0	$ 0
Derivative liabilities - Fair value	$ 0	$ 516
Commodity contracts | Purchased options | Other economic hedges: | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	1,559	0
Gross amounts recognized	$ 179	$ 0
Derivative liabilities - Fair value	$ 0	$ 0
Commodity contracts | Collars | Customer-related positions: | Crude oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	5,474	3,011
Gross amounts recognized	$ 1,824	$ 16,038
Derivative liabilities - Fair value	$ 7,375	$ 2,630
Commodity contracts | Collars | Customer-related positions: | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	36,161	32,072
Gross amounts recognized	$ 524	$ 2,217
Derivative liabilities - Fair value	$ 17,545	$ 18,317
Commodity contracts | Collars | Other economic hedges: | Crude oil
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | Boe	5,474	3,942
Gross amounts recognized	$ 6,580	$ 1,378
Derivative liabilities - Fair value	$ 1,700	$ 12,856
Commodity contracts | Collars | Other economic hedges: | Natural gas
Derivative [Line Items]
Derivative, nonmonetary notional amount, energy measure | MMBTU	35,821	31,142
Gross amounts recognized	$ 16,082	$ 12,451
Derivative liabilities - Fair value	$ 524	$ 1,960