Derivatives - Schedule of Notional and Gross Fair Values of Derivatives (Details) shares in Thousands, $ in Thousands, MMBTU in Millions, Boe in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2026 USD ($) MMBTU Boe company shares	Dec. 31, 2025 USD ($) Boe MMBTU company shares
Derivative assets:
Derivative assets - Fair value	$ 470,335	$ 409,467
Less: Master netting agreements	(111,845)	(74,138)
Less: Cash collateral received	(170,048)	(183,387)
Net derivative assets	188,442	151,942
Derivative liabilities:
Gross amounts recognized	433,751	385,973
Less: Master netting agreements	(111,845)	(74,138)
Amount used to offset against derivative liabilities	(17,540)	(27,502)
Net derivative liabilities	304,366	284,333
Derivatives not Designated as Hedging Instruments
Derivative Instruments
Notional Amount	23,604,378	23,840,799
Derivative assets:
Derivative assets - Fair value	447,724	369,470
Derivative liabilities:
Gross amounts recognized	$ 428,432	$ 385,834
Derivatives not Designated as Hedging Instruments | Performance-Based RSUs
Derivative liabilities:
Derivative liability granted number of shares | shares	349	349
Derivatives not Designated as Hedging Instruments | Crude Oil
Derivative liabilities:
Derivative, nonmonetary notional amount, energy measure | Boe	19	16
Derivatives not Designated as Hedging Instruments | Natural Gas
Derivative liabilities:
Derivative, nonmonetary notional amount, energy measure | MMBTU	280	364
Interest rate contracts | Derivatives not Designated as Hedging Instruments
Derivative Instruments
Notional Amount	$ 18,386,728	$ 18,987,277
Derivative assets:
Derivative assets - Fair value	245,137	258,561
Derivative liabilities:
Gross amounts recognized	243,178	256,731
Interest rate contracts | Cash Flow Hedging | Derivative Instruments Designated as Hedging Instruments
Derivative Instruments
Notional Amount	4,250,000	4,250,000
Derivative assets:
Derivative assets - Fair value	22,611	39,997
Derivative liabilities:
Gross amounts recognized	5,319	139
Commodity contracts | Derivatives not Designated as Hedging Instruments
Derivative Instruments
Notional Amount	0	0
Derivative assets:
Derivative assets - Fair value	146,385	66,022
Derivative liabilities:
Gross amounts recognized	122,088	72,158
Foreign exchange contracts | Derivatives not Designated as Hedging Instruments
Derivative Instruments
Notional Amount	4,869,406	4,550,101
Derivative assets:
Derivative assets - Fair value	55,603	44,340
Derivative liabilities:
Gross amounts recognized	49,991	43,160
Credit contracts | Derivatives not Designated as Hedging Instruments
Derivative Instruments
Notional Amount	348,244	303,421
Derivative assets:
Derivative assets - Fair value	16	25
Derivative liabilities:
Gross amounts recognized	129	51
Equity contracts | Derivatives not Designated as Hedging Instruments
Derivative Instruments
Notional Amount	0	0
Derivative assets:
Derivative assets - Fair value	583	522
Derivative liabilities:
Gross amounts recognized	$ 13,046	$ 13,734
Private Companies | Derivatives not Designated as Hedging Instruments
Derivative liabilities:
Number of companies that issued the equity (issuers portion only) | company	9	9