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Summary of Significant Accounting Policies (Details) (USD $) In Billions, unless otherwise specified | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2014 Carrying Value, Fair Value Disclosure [Member] | Dec. 31, 2013 Carrying Value, Fair Value Disclosure [Member] | Jun. 30, 2014 Estimate of Fair Value, Fair Value Disclosure [Member] | Dec. 31, 2013 Estimate of Fair Value, Fair Value Disclosure [Member]
Revenue Recognition [Abstract] |  |  |  |  |
Term of residency agreements- minimum | 30 days |  |  |  |
Term of residency agreements - maximum | 1 year |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |
Long-term Debt, Fair Value |  | $ 2.6 | $ 2.6 | $ 2.6 | $ 2.6

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- Definition Term Of Residency Agreements Maximum + References No definition available. + Details
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- Definition Term of Residency Agreements- Minimum. + References No definition available. + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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