Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities Interest Spread on Interest Rate Swaps and Caps (Details)

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Derivative Instruments and Hedging Activities Interest Spread on Interest Rate Swaps and Caps (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]                
Derivative, Notional Amount $ 25,836,064,000 $ 54,226,205,000 $ 25,836,064,000 $ 54,226,205,000 $ 8,076,933,000 $ 48,445,497,000 $ 55,549,424,000 $ 36,528,169,000
Average Notional Amount 13,932,642,000 54,069,162,000 37,837,985,000 52,960,859,000        
Interest Rate Contract [Member]                
Derivative Instruments, Gain (Loss) [Line Items]                
Net interest expense (income) on interest rate swaps and caps 800,000 19,200,000 (68,100,000) 65,700,000        
Net Long Position [Member] | Interest Rate Contract [Member]                
Derivative Instruments, Gain (Loss) [Line Items]                
Average Notional Amount $ 7,600,000,000 $ 41,200,000,000 $ 32,000,000,000.0 $ 39,800,000,000