Derivative Instruments and Hedging Activities Interest Spread on Interest Rate Swaps and Caps (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Jun. 30, 2019 |
Dec. 31, 2018 |
Jun. 30, 2018 |
Dec. 31, 2017 |
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
| Derivative, Notional Amount | $ 54,226,205,000 | $ 41,330,283,000 | $ 54,226,205,000 | $ 41,330,283,000 | $ 55,549,424,000 | $ 36,528,169,000 | $ 28,618,861,000 | $ 31,226,878,000 |
| Average Notional Amount | 54,069,162,000 | 37,022,610,000 | 52,960,859,000 | 27,181,648,000 | ||||
| Interest Rate Contract [Member] | ||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
| Net interest expense (income) on interest rate swaps and caps | 19,200,000 | 16,200,000 | 65,700,000 | 33,900,000 | ||||
| Net Long Position [Member] | Interest Rate Contract [Member] | ||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||
| Average Notional Amount | $ 41,200,000,000 | $ 31,800,000,000 | $ 39,800,000,000 | $ 26,200,000,000 | ||||
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- Definition Average notional amount during the period presented specified by the derivative(s). No definition available.
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- Definition Net interest spread on interest rate swap and cap agreements, at fair value. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Nominal or face amount used to calculate payment on derivative. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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