Derivatives - Schedule of Derivatives Not Designated as Hedging Instruments (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) MMBTU Boe	Dec. 31, 2023 USD ($) MMBTU Boe
Derivative [Line Items]
Derivative assets - Fair value	$ 490,588	$ 610,920
Derivative liabilities - Fair value	465,842	613,314
Customer-related positions:
Derivative [Line Items]
Notional amount	10,568,989	11,362,194
Derivative assets - Fair value	74,380	43,195
Derivative liabilities - Fair value	284,628	419,499
Other economic hedges:
Derivative [Line Items]
Notional amount	10,758,602	11,852,864
Derivative assets - Fair value	287,531	433,969
Derivative liabilities - Fair value	75,809	43,877
Interest rate contracts | Customer-related positions:
Derivative [Line Items]
Notional amount	8,490,879	8,681,085
Derivative assets - Fair value	50,362	26,089
Derivative liabilities - Fair value	276,178	394,625
Interest rate contracts | Other economic hedges:
Derivative [Line Items]
Notional amount	8,508,713	8,706,824
Derivative assets - Fair value	277,583	397,397
Derivative liabilities - Fair value	50,608	26,187
Interest rate contracts | Swaps | Customer-related positions:
Derivative [Line Items]
Notional amount	6,867,025	6,835,822
Derivative assets - Fair value	49,900	25,649
Derivative liabilities - Fair value	270,699	377,388
Interest rate contracts | Swaps | Other economic hedges:
Derivative [Line Items]
Notional amount	6,884,859	6,861,561
Derivative assets - Fair value	272,079	380,123
Derivative liabilities - Fair value	50,132	25,731
Interest rate contracts | Written options | Customer-related positions:
Derivative [Line Items]
Notional amount	1,451,899	1,522,531
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	5,016	12,756
Interest rate contracts | Collars and corridors | Customer-related positions:
Derivative [Line Items]
Notional amount	171,955	322,732
Derivative assets - Fair value	462	440
Derivative liabilities - Fair value	463	4,481
Interest rate contracts | Collars and corridors | Other economic hedges:
Derivative [Line Items]
Notional amount	171,955	322,732
Derivative assets - Fair value	465	4,491
Derivative liabilities - Fair value	476	456
Interest rate contracts | Purchased options | Other economic hedges:
Derivative [Line Items]
Notional amount	1,451,899	1,522,531
Derivative assets - Fair value	5,039	12,783
Derivative liabilities - Fair value	0	0
Foreign exchange contracts | Customer-related positions:
Derivative [Line Items]
Notional amount	2,078,110	2,681,109
Derivative assets - Fair value	24,018	17,106
Derivative liabilities - Fair value	8,450	24,874
Foreign exchange contracts | Other economic hedges:
Derivative [Line Items]
Notional amount	2,249,889	3,146,040
Derivative assets - Fair value	9,948	36,572
Derivative liabilities - Fair value	25,201	17,690
Foreign exchange contracts | Swaps | Customer-related positions:
Derivative [Line Items]
Notional amount	1,213,126	1,588,491
Derivative assets - Fair value	9,345	5,801
Derivative liabilities - Fair value	5,514	18,118
Foreign exchange contracts | Swaps | Other economic hedges:
Derivative [Line Items]
Notional amount	2,208,866	2,862,037
Derivative assets - Fair value	9,820	36,280
Derivative liabilities - Fair value	25,110	15,757
Foreign exchange contracts | Written options | Other economic hedges:
Derivative [Line Items]
Notional amount	20,000	136,000
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	31	1,839
Foreign exchange contracts | Forwards and spot | Customer-related positions:
Derivative [Line Items]
Notional amount	844,984	956,618
Derivative assets - Fair value	14,642	9,466
Derivative liabilities - Fair value	2,936	6,756
Foreign exchange contracts | Forwards and spot | Other economic hedges:
Derivative [Line Items]
Notional amount	21,023	148,003
Derivative assets - Fair value	128	292
Derivative liabilities - Fair value	60	94
Foreign exchange contracts | Purchased options | Customer-related positions:
Derivative [Line Items]
Notional amount	20,000	136,000
Derivative assets - Fair value	31	1,839
Derivative liabilities - Fair value	0	0
Commodity contracts | Customer-related positions:
Derivative [Line Items]
Derivative assets - Fair value	6,182	6,014
Derivative liabilities - Fair value	85,142	114,974
Commodity contracts | Customer-related positions: | Crude oil
Derivative [Line Items]
Derivative assets - Fair value	1,726	5,555
Derivative liabilities - Fair value	$ 24,975	$ 20,548
Derivative, nonmonetary notional amount, energy measure | Boe	8,593	9,243
Commodity contracts | Customer-related positions: | Natural gas
Derivative [Line Items]
Derivative assets - Fair value	$ 4,456	$ 459
Derivative liabilities - Fair value	$ 60,167	$ 94,426
Derivative, nonmonetary notional amount, energy measure | MMBTU	225,957	166,053
Commodity contracts | Other economic hedges:
Derivative [Line Items]
Derivative assets - Fair value	$ 58,798	$ 73,590
Derivative liabilities - Fair value	4,860	6,696
Commodity contracts | Other economic hedges: | Crude oil
Derivative [Line Items]
Derivative assets - Fair value	15,047	10,851
Derivative liabilities - Fair value	$ 1,670	$ 6,391
Derivative, nonmonetary notional amount, energy measure | Boe	8,593	9,388
Commodity contracts | Other economic hedges: | Natural gas
Derivative [Line Items]
Derivative assets - Fair value	$ 43,751	$ 62,739
Derivative liabilities - Fair value	$ 3,190	$ 305
Derivative, nonmonetary notional amount, energy measure | MMBTU	221,715	162,791
Commodity contracts | Swaps | Customer-related positions: | Crude oil
Derivative [Line Items]
Derivative assets - Fair value	$ 1,680	$ 3,735
Derivative liabilities - Fair value	$ 15,382	$ 15,445
Derivative, nonmonetary notional amount, energy measure | Boe	3,407	3,277
Commodity contracts | Swaps | Customer-related positions: | Natural gas
Derivative [Line Items]
Derivative assets - Fair value	$ 3,559	$ 438
Derivative liabilities - Fair value	$ 45,602	$ 73,793
Derivative, nonmonetary notional amount, energy measure | MMBTU	155,871	118,325
Commodity contracts | Swaps | Other economic hedges: | Crude oil
Derivative [Line Items]
Derivative assets - Fair value	$ 10,630	$ 9,166
Derivative liabilities - Fair value	$ 1,670	$ 4,924
Derivative, nonmonetary notional amount, energy measure | Boe	3,407	3,422
Commodity contracts | Swaps | Other economic hedges: | Natural gas
Derivative [Line Items]
Derivative assets - Fair value	$ 35,173	$ 49,941
Derivative liabilities - Fair value	$ 2,343	$ 305
Derivative, nonmonetary notional amount, energy measure | MMBTU	153,199	116,463
Commodity contracts | Written options | Customer-related positions: | Natural gas
Derivative [Line Items]
Derivative assets - Fair value	$ 142	$ 0
Derivative liabilities - Fair value	$ 0	$ 233
Derivative, nonmonetary notional amount, energy measure | MMBTU	1,456	1,874
Commodity contracts | Purchased options | Other economic hedges: | Natural gas
Derivative [Line Items]
Derivative assets - Fair value	$ 0	$ 233
Derivative liabilities - Fair value	$ 125	$ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU	1,456	1,874
Commodity contracts | Collars | Customer-related positions: | Crude oil
Derivative [Line Items]
Derivative assets - Fair value	$ 46	$ 1,820
Derivative liabilities - Fair value	$ 9,593	$ 5,103
Derivative, nonmonetary notional amount, energy measure | Boe	5,186	5,966
Commodity contracts | Collars | Customer-related positions: | Natural gas
Derivative [Line Items]
Derivative assets - Fair value	$ 755	$ 21
Derivative liabilities - Fair value	$ 14,565	$ 20,400
Derivative, nonmonetary notional amount, energy measure | MMBTU	68,630	45,854
Commodity contracts | Collars | Other economic hedges: | Crude oil
Derivative [Line Items]
Derivative assets - Fair value	$ 4,417	$ 1,685
Derivative liabilities - Fair value	$ 0	$ 1,467
Derivative, nonmonetary notional amount, energy measure | Boe	5,186	5,966
Commodity contracts | Collars | Other economic hedges: | Natural gas
Derivative [Line Items]
Derivative assets - Fair value	$ 8,578	$ 12,565
Derivative liabilities - Fair value	$ 722	$ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU	67,060	44,454