XML 53 R40.htm IDEA: XBRL DOCUMENT v3.20.2
FAIR VALUE MEASUREMENTS - Part 1 (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash held - offsetting derivative net asset positions under master-netting arrangements $ 0 $ 0
Cash posted - total 48,200 8,800
Cash posted - offsetting derivative net liability positions under master-netting arrangements 13,900  
Cash posted - remaining in excess of derivative net liability positions included in consolidated Balance Sheets 34,300  
Long-term debt, Fair Value 14,900,000 13,800,000
Long-term debt 14,300,000 12,500,000
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member]    
Derivative assets    
Derivative asset, fair value, gross 46,859 67,030
Derivative liability, fair value, gross (292,740) (231,537)
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Financial Contracts [Member]    
Derivative assets    
Derivative asset, fair value, gross 46,859 66,449
Derivative liability, fair value, gross (60,749) (29,596)
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Interest-rate contracts    
Derivative assets    
Interest-rate contracts   581
Derivative liabilities    
Interest rate derivative liabilities, at fair value (231,991) (201,941)
Fair Value, Recurring [Member]    
Derivative assets    
Derivative assets 0 38,442
Derivative assets netting (46,859) (28,588)
Derivative liabilities    
Derivative liabilities (231,991) (202,949)
Derivative liabilities netting 60,749 28,588
Fair Value, Recurring [Member] | Financial Contracts [Member]    
Derivative assets    
Derivative assets 0 37,861
Derivative assets netting (46,859) (28,588)
Derivative liabilities    
Derivative liabilities 0 (1,008)
Derivative liabilities netting 60,749 28,588
Fair Value, Recurring [Member] | Interest-rate contracts    
Derivative assets    
Interest-rate contracts   581
Derivative assets netting   0
Derivative liabilities    
Interest rate derivative liabilities, at fair value (231,991) (201,941)
Derivative liabilities netting 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Derivative assets    
Derivative asset, fair value, gross 4,963 10,892
Derivative liability, fair value, gross (13,509) (4,811)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Financial Contracts [Member]    
Derivative assets    
Derivative asset, fair value, gross 4,963 10,892
Derivative liability, fair value, gross (13,509) (4,811)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest-rate contracts    
Derivative assets    
Interest-rate contracts   0
Derivative liabilities    
Interest rate derivative liabilities, at fair value 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Derivative assets    
Derivative asset, fair value, gross 0 581
Derivative liability, fair value, gross (231,991) (201,941)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Financial Contracts [Member]    
Derivative assets    
Derivative asset, fair value, gross 0 0
Derivative liability, fair value, gross 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest-rate contracts    
Derivative assets    
Interest-rate contracts   581
Derivative liabilities    
Interest rate derivative liabilities, at fair value (231,991) (201,941)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Derivative assets    
Derivative asset, fair value, gross 41,896 55,557
Derivative liability, fair value, gross (47,240) (24,785)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Financial Contracts [Member]    
Derivative assets    
Derivative asset, fair value, gross 41,896 55,557
Derivative liability, fair value, gross (47,240) (24,785)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest-rate contracts    
Derivative assets    
Interest-rate contracts   0
Derivative liabilities    
Interest rate derivative liabilities, at fair value $ 0 $ 0