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Derivatives - Narrative (Details)
MMBTU in Thousands, Boe in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
Boe
MMBTU
company
Dec. 31, 2021
USD ($)
Boe
MMBTU
company
Dec. 31, 2020
USD ($)
Derivative [Line Items]      
Derivative assets - Fair value $ 755,328 $ 484,184  
Derivative liabilities - Fair Value $ 887,264 $ 390,171  
Crude Oil      
Derivative [Line Items]      
Derivative, nonmonetary notional amount, energy measure | Boe 12,005 17,924  
Natural Gas      
Derivative [Line Items]      
Derivative, nonmonetary notional amount, energy measure | MMBTU 247,704 218,770  
Derivatives not designated as hedging instruments:      
Derivative [Line Items]      
Notional amount $ 20,056,255 $ 19,522,661  
Derivative assets - Fair value 736,283 484,184  
Derivative liabilities - Fair Value 867,577 389,889  
Derivative instruments designated as hedging instruments      
Derivative [Line Items]      
Notional amount 3,534,832 361,531  
Derivative assets - Fair value 19,045 0  
Derivative liabilities - Fair Value 19,687 282  
Fair Value Hedging | Derivative instruments designated as hedging instruments | Interest Expense | Certificates of deposits      
Derivative [Line Items]      
Gains (losses) recognized in interest expense     $ (1,600)
Interest Rate Swap [Member] | Fair Value Hedging | Derivative instruments designated as hedging instruments | Interest Expense      
Derivative [Line Items]      
Gains (losses) recognized in interest expense     $ 3,100
Interest rate contracts | Derivatives not designated as hedging instruments:      
Derivative [Line Items]      
Notional amount 16,932,414 17,575,420  
Derivative assets - Fair value 426,828 240,222  
Derivative liabilities - Fair Value 564,829 179,905  
Interest rate contracts | Derivatives not designated as hedging instruments: | London Clearing House      
Derivative [Line Items]      
Derivative assets - Fair value 163,400 20,400  
Derivative liabilities - Fair Value 12,100 105,700  
Interest rate contracts | Cash Flow Hedging | Derivative instruments designated as hedging instruments      
Derivative [Line Items]      
Notional amount 3,450,000 275,000  
Net unrealized losses, net of tax, recorded in AOCI expected to be reclassified into earnings during the next 12 months (41,000)    
Derivative assets - Fair value 13,455 0  
Derivative liabilities - Fair Value 19,687 57  
Interest rate contracts | Fair Value Hedging | Derivative instruments designated as hedging instruments      
Derivative [Line Items]      
Derivative assets - Fair value 0 0  
Credit Risk Contract [Member] | Derivatives not designated as hedging instruments:      
Derivative [Line Items]      
Notional amount $ 140,950 $ 72,560  
Weighted average remaining maturity of outstanding RPAs 2 years 4 months 24 days 3 years 2 months 12 days  
Derivative assets - Fair value $ 0 $ 0  
Derivative liabilities - Fair Value 23 141  
Credit Risk Contract [Member] | Derivatives not designated as hedging instruments: | RPAs - protection sold      
Derivative [Line Items]      
Maximum exposure of RPAs with protection sold $ 0 $ 3,200  
Equity, Public Companies | Derivatives not designated as hedging instruments:      
Derivative [Line Items]      
Number of companies that Issued the equity contracts (Issuers Portion Only) | company 1 1  
Equity, Private Companies | Derivatives not designated as hedging instruments:      
Derivative [Line Items]      
Number of companies that Issued the equity contracts (Issuers Portion Only) | company 13 12  
Credit-Risk-Related Contingent Features      
Derivative [Line Items]      
Aggregate fair value of derivative instruments in net liability position $ 2,600 $ 66,800  
Associated posted collateral 1,100 66,600  
Foreign exchange contracts | Derivatives not designated as hedging instruments:      
Derivative [Line Items]      
Notional amount 2,982,891 1,874,681  
Derivative assets - Fair value 47,519 21,033  
Derivative liabilities - Fair Value $ 44,117 $ 15,276  
Foreign exchange contracts | Derivatives not designated as hedging instruments: | Maximum      
Derivative [Line Items]      
Original maturity (in years) 1 year 1 year  
Commercial Banking | Interest Rate Swap [Member] | Cash Flow Hedging | Derivative instruments designated as hedging instruments      
Derivative [Line Items]      
Notional amount $ 3,250,000    
Borrowings | Interest Rate Swap [Member] | Cash Flow Hedging | Derivative instruments designated as hedging instruments      
Derivative [Line Items]      
Notional amount $ 200,000