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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2015 | Jun. 30, 2015 | Dec. 31, 2014
Carrying Value, Fair Value Disclosure [Member] |  |  |
Fair value of financial instruments [Abstract] |  |  |
Debt |  | $ 3,600.0 | $ 3,500.0
Capital and financing obligations |  | 2,600.0 | 2,600.0
Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |
Fair value of financial instruments [Abstract] |  |  |
Debt |  | 3,600.0 | 3,500.0
Capital and financing obligations |  | $ 2,600.0 | $ 2,600.0
Term of residency agreements- minimum |  | 30 days |
Term of residency agreements - maximum |  | 1 year |
Reclassification [Member] |  |  |
Prior Period Reclassifications [Line Items] |  |  |
Facility Operating Expense | $ 5.3 |  |

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