|
Interest Rate Swaps (Details) (USD $)
|
12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||
| Interest rate swaps, combined notional amount | $ 5,300,000,000 | |||||||||||
| Settlement amount of forward-starting interest rate swaps | 0 | 697,821,000 | 36,670,000 | |||||||||
| Gain (loss) recognized in OCI (effective portion) | (973,000) | [1] | (125,850,000) | [1] | 140,056,000 | [1] | ||||||
| Gain (loss) reclassified from accumulated OCI into income (effective portion) | (71,707,000) | [1] | (54,169,000) | [1] | (19,158,000) | [1] | ||||||
| Amount of gain (loss) recognized in income (ineffective portion excluded from effectiveness testing) | 0 | [1] | 0 | [1] | (3,920,000) | [1] | ||||||
| Gain (loss) recognized in income | 0 | [1] | (286,435,000) | [1],[2] | (89,046,000) | [1],[3] | ||||||
|
Interest Rate Swap [Member]
|
||||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||
| Forward-starting Derivative Interest Rate Swap Maturity Period | 5 years | |||||||||||
|
Interest Rate Swap [Member] | Refinancings of Debt [Member]
|
||||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||
| Loss recognized in income discontinuation of hedge accounts | 3,400,000 | 132,900,000 | ||||||||||
|
Interest Rate Contract [Member] | Cash Flow Hedging [Member]
|
||||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||
| Estimated amount expected to be reclassified into earnings from accumulated other comprehensive income (loss) during next twelve months | $ 65,000,000 | |||||||||||
|
Weighted-Average Actual Five Year LIBOR Upon Issuance of the Anticpated Refinancings [Member]
|
||||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||
| Derivative, average variable interest rate | 2.40% | |||||||||||
|
Weighted-Average Hedged Five Year LIBOR on the Anticipated Refinancings [Member]
|
||||||||||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||
| Derivative, average variable interest rate | 5.20% | |||||||||||
|
||||||||||||