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FAIR VALUE MEASUREMENTS - Part 1 (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Cash held - offsetting derivative net asset positions under master-netting arrangements $ 0 $ 0
Cash posted - total 110,000 157,000
Cash posted - offsetting derivative net liability positions under master-netting arrangements 20,100 99,600
Cash posted - remaining in excess of derivative net liability positions included in consolidated Balance Sheets 89,900 57,400
Long-term debt, fair value 11,500,000 15,600,000
Long-term debt 12,900,000 13,600,000
Fair Value, Recurring [Member] | Gross Fair Value Measurement [Member]    
Derivative assets    
Derivative asset, fair value, gross 304,076  
Derivative liabilities    
Derivative liability, fair value, gross (256,757)  
Fair Value, Recurring [Member] | Gross Fair Value Measurement [Member] | Financial Contracts    
Derivative assets    
Derivative asset, fair value, gross 236,699 204,161
Derivative liabilities    
Derivative liability, fair value, gross (256,757) (303,740)
Fair Value, Recurring [Member] | Gross Fair Value Measurement [Member] | Interest Rate Contracts    
Derivative assets    
Interest-rate contracts 67,377  
Derivative liabilities    
Interest-rate contracts   (145,524)
Fair Value, Recurring [Member]    
Derivative assets    
Derivative assets 67,377 0
Derivative assets netting (236,699) (204,161)
Derivative liabilities    
Derivative liabilities 0 (145,524)
Derivative liabilities netting 256,757 303,740
Fair Value, Recurring [Member] | Financial Contracts    
Derivative assets    
Derivative assets 0 0
Derivative assets netting (236,699) (204,161)
Derivative liabilities    
Derivative liabilities 0 0
Derivative liabilities netting 256,757 303,740
Fair Value, Recurring [Member] | Interest Rate Contracts    
Derivative assets    
Interest-rate contracts 67,377  
Derivative assets netting 0  
Derivative liabilities    
Interest-rate contracts   (145,524)
Derivative liabilities netting   0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Derivative assets    
Derivative asset, fair value, gross 10,959 22,019
Derivative liabilities    
Derivative liability, fair value, gross (112,578) (67,226)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Contracts    
Derivative assets    
Derivative asset, fair value, gross 10,959 22,019
Derivative liabilities    
Derivative liability, fair value, gross (112,578) (67,226)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Contracts    
Derivative assets    
Interest-rate contracts 0  
Derivative liabilities    
Interest-rate contracts   0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Derivative assets    
Derivative asset, fair value, gross 201,733 172,833
Derivative liabilities    
Derivative liability, fair value, gross (104,047) (258,446)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Contracts    
Derivative assets    
Derivative asset, fair value, gross 134,356 172,833
Derivative liabilities    
Derivative liability, fair value, gross (104,047) (112,922)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Contracts    
Derivative assets    
Interest-rate contracts 67,377  
Derivative liabilities    
Interest-rate contracts   (145,524)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Derivative assets    
Derivative asset, fair value, gross 91,384 9,309
Derivative liabilities    
Derivative liability, fair value, gross (40,132) (123,592)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Contracts    
Derivative assets    
Derivative asset, fair value, gross 91,384 9,309
Derivative liabilities    
Derivative liability, fair value, gross (40,132) (123,592)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Contracts    
Derivative assets    
Interest-rate contracts $ 0  
Derivative liabilities    
Interest-rate contracts   $ 0