Derivative Instruments and Hedging Activities Interest Spread on Interest Rate Swaps (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Derivative, Average Notional Amount | $ 21,641,836 | $ 29,925,251 | |
| Interest Rate Swap [Member] | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Interest Expense on Interest Rate Swap and Swaption Agreements | (21,074) | (85,636) | $ (91,754) |
| Derivative, Average Notional Amount | $ 15,506,763 | $ 16,091,714 | $ 23,329,504 |
| X | ||||||||||
- Definition Average notional amount during the period presented specified by the derivative(s). No definition available.
|
| X | ||||||||||
- Definition Net interest spread on interest rate swap and swaption agreements, at fair value. No definition available.
|
| X | ||||||||||
- 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.
|
| X | ||||||||||
- Details
|