Derivatives - Notional and Fair Values (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($) MMBTU Boe company shares	Dec. 31, 2023 USD ($) Boe MMBTU company
Derivative Assets
Derivative assets - Fair value	$ 622,238	$ 610,920
Less: Master Netting Arrangements	(132,555)	(75,534)
Less: Cash collateral received	(356,707)	(237,258)
Net derivative assets	132,976	298,128
Derivative Liabilities
Gross amounts recognized	693,548	613,314
Less: Master Netting Arrangements	(132,555)	(75,534)
Amount used to offset against derivative liabilities	(2,408)	(636)
Net derivative liabilities	$ 558,585	$ 537,144
Performance-Based RSUs | Rayliant Global Advisors Limited
Derivative Liabilities
Derivative liability granted number of shares | shares	349,138
Crude oil
Derivative Liabilities
Derivative, nonmonetary notional amount, energy measure | Boe	18,468	18,631
Natural gas
Derivative Liabilities
Derivative, nonmonetary notional amount, energy measure | MMBTU	350,942	328,844
Derivative instruments designated as hedging instruments
Derivative Instruments
Notional amount	$ 5,250,000	$ 5,331,480
Derivative Assets
Derivative assets - Fair value	15,707	53,815
Derivative Liabilities
Gross amounts recognized	49,616	13,124
Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	21,927,035	23,333,449
Derivative Assets
Derivative assets - Fair value	606,531	557,105
Derivative Liabilities
Gross amounts recognized	643,932	600,190
Interest rate contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	16,910,462	17,387,909
Derivative Assets
Derivative assets - Fair value	469,087	423,486
Derivative Liabilities
Gross amounts recognized	468,714	420,812
Interest rate contracts | Cash Flow Hedging | Derivative instruments designated as hedging instruments
Derivative Instruments
Notional amount	5,250,000	5,250,000
Derivative Assets
Derivative assets - Fair value	15,707	50,421
Derivative Liabilities
Gross amounts recognized	49,616	13,124
Foreign exchange contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	4,898,429	5,827,149
Derivative Assets
Derivative assets - Fair value	60,499	53,678
Derivative Liabilities
Gross amounts recognized	53,153	42,564
Foreign exchange contracts | Net Investment Hedging | Derivative instruments designated as hedging instruments
Derivative Instruments
Notional amount	0	81,480
Derivative Assets
Derivative assets - Fair value	0	3,394
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	76,615	79,604
Derivative Liabilities
Gross amounts recognized	106,930	121,670
Credit contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	118,144	118,391
Derivative Assets
Derivative assets - Fair value	0	1
Derivative Liabilities
Gross amounts recognized	16	25
Equity contracts | Derivatives not designated as hedging instruments
Derivative Instruments
Notional amount	0	0
Derivative Assets
Derivative assets - Fair value	330	336
Derivative Liabilities
Gross amounts recognized	$ 15,119	$ 15,119
Public Companies | Derivatives not designated as hedging instruments
Derivative Liabilities
Number of companies that issued the equity (issuers portion only) | company	1	1
Private Companies | Derivatives not designated as hedging instruments
Derivative Liabilities
Number of companies that issued the equity (issuers portion only) | company	11	11