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Debt (Details) £ in Millions |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2016 USD ($) | Sep. 15, 2016 USD ($) | Feb. 01, 2016 USD ($) | Dec. 01, 2015 USD ($) | Jun. 08, 2015 USD ($) | May 20, 2015 USD ($) | Mar. 01, 2015 USD ($) | Jan. 21, 2015 USD ($) | Jan. 12, 2015 GBP (£) | Jul. 30, 2012 GBP (£) | Jan. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2016 GBP (£) item | Dec. 31, 2016 USD ($) item | Jan. 12, 2015 USD ($)
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments under bank line of credit |  |  |  |  |  |  |  |  |  |  |  | $ 540,000,000 | $ 511,521,000 |  |  |  |
Bank line of credit |  |  |  |  |  |  |  |  |  |  |  |  | 397,432,000 |  |  | $ 899,718,000 |
Senior unsecured notes |  |  |  |  |  |  |  |  |  |  |  |  | 9,120,107,000 |  |  | 7,133,538,000 |
Total debt before discount, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,159,839,000 |
(Discounts), premiums and debt costs, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (62,729,000) |
Debt instruments, carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,097,110,000 |
Other debt |  |  |  |  |  |  |  |  |  |  |  |  | $ 94,445,000 |  |  | 92,385,000 |
Issuance of mortgage and other debt |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 35,445,000 |  |  |
Debt maturing in 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 899,100,000 |
Debt maturing in 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 903,359,000 |
Debt maturing in 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 725,715,000 |
Debt maturing in 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 803,907,000 |
Debt maturing in 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,211,277,000 |
Thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,616,481,000 |
Line of Credit and Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, covenant debt to assets (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% | 60.00% |
Debt instrument, covenant secured debt to assets (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30.00% | 30.00% |
Debt instrument, covenant unsecured debt to unencumbered assets (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% | 60.00% |
Debt instrument, covenant minimum fixed charge coverage ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.5 | 1.5 |
Debt instrument, covenant net worth |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,500,000,000 |
Bank Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000,000 |
Repayments under bank line of credit | £ |  |  |  |  |  |  |  |  | £ 220 |  |  |  |  |  |  |  |
Extended debt instrument term - not used in 10Q |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 1.05% |  |  |  |  |
Debt instrument, facility fee (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 0.20% |  |  |  |  |
Line of credit facility additional aggregate amount, maximum |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |  |  |  |
Bank line of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 900,000,000 |
Weighted-average interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.82% | 1.82% |
Line of credit, portion denominated in GBP | £ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | £ 372 |  |
Term loans, portion denominated in GBP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 460,000,000 |
Total debt before discount, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 899,718,000 |
Debt instruments, carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 899,718,000 |
Bank Line of Credit | Debt maturing in 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 899,718,000 |
Term loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | £ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 357 |  |
2021 | £ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | £ 357 |  |
Total debt before discount, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 441,181,000 |
(Discounts), premiums and debt costs, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,119,000) |
Debt instruments, carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 440,062,000 |
Term loans | Debt maturing in 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 169,305,000 |
Term loans | Debt maturing in 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 271,876,000 |
2012 Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, variable rate basis |  |  |  |  |  |  |  |  |  | GBP LIBOR |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  |  |  |  |  |  |  |  | 1.40% |  |  |  |  |  |  |
Maturity period of debt instruments |  |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |
Debt instruments, carrying amount |  |  |  |  |  |  |  |  |  | £ 137 |  |  |  |  |  | $ 169,000,000 |
2015 Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, variable rate basis |  |  |  |  |  |  |  |  | GBP LIBOR |  |  |  |  |  |  |  |
Length of debt instrument extension period |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  |  |  |  |  |  |  | 1.15% |  |  |  |  |  |  |  |
Derivative, fixed interest rate (as a percent) |  |  |  |  |  |  |  |  | 1.97% |  |  |  |  |  |  |  | 1.97%
Senior unsecured notes |  |  |  |  |  |  |  |  | £ 220 |  |  |  |  |  |  |  | $ 272,000,000
Maturity period of debt instruments |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |
Term of the interest rate swap agreement |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |
Unsecured Debt. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.34% | 4.34% |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.34% | 4.34% |
Total debt before discount, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,200,000,000 |
(Discounts), premiums and debt costs, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (66,462,000) |
Debt instruments, carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,133,538,000 |
Weighted-average maturity |  |  |  |  |  |  |  |  |  |  |  | 6 years |  |  |  |  |
Unsecured Debt. | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.79% | 2.79% |
Unsecured Debt. | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.88% | 6.88% |
Unsecured Debt. | Debt maturing in 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.72% | 5.72% |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 250,000,000 |
Unsecured Debt. | Debt maturing in 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.95% | 3.95% |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 450,000,000 |
Unsecured Debt. | Debt maturing in 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.81% | 2.81% |
2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 800,000,000 |
Unsecured Debt. | Debt maturing in 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.54% | 5.54% |
2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,200,000,000 |
Unsecured Debt. | Thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.27% | 4.27% |
Thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,500,000,000 |
Senior Unsecured, 3.40% notes due 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  | $ 600,000,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  | 3.40% |  |  |  |  |  |  |  |  |
Net proceeds from issuance of senior unsecured notes |  |  |  |  |  |  |  | $ 591,000,000 |  |  |  |  |  |  |  |  |
Senior Unsecured 4.0% notes due 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  | $ 750,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |
Net proceeds from issuance of senior unsecured notes |  |  |  |  |  | $ 739,000,000 |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured, 4.0% notes due 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 600,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from issuance of senior unsecured notes |  |  |  | $ 594,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured, 6.00% notes due in 2017 | Debt maturing in 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.00% | 6.00% |
Senior Unsecured, 6.70% notes due in 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank line of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |
Senior Unsecured Debt 6.000 Percent Incepted November 30 2016 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) | 6.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of senior unsecured notes | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Debt 6.700 Percent Incepted November 30 2016 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) | 6.70% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of senior unsecured notes | $ 600,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Debt 3.75 Percent Incepted February 1 2016 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  | 3.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of senior unsecured notes |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Debt 6.30 Percent Incepted September 15 2016[Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  | 6.30% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of senior unsecured notes |  | $ 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Debt 6.0 Percent Incepted March 1, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  | 6.00% |  |  |  |  |  |  |  |  |  |
Repayment of senior unsecured notes |  |  |  |  |  |  | $ 200,000,000 |  |  |  |  |  |  |  |  |  |
Senior Unsecured Debt 7.07 Percent Incepted June 8, 2015 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  | 7.072% |  |  |  |  |  |  |  |  |  |  |  |
Repayment of senior unsecured notes |  |  |  |  | $ 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Mortgage Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.40% | 3.40% |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.40% | 3.40% |
Number of healthcare facilities used to secure debt | item |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36 | 36 |
Debt instrument, collateral, healthcare facilities carrying value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 899,000,000 |
Total debt before discount, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 618,940,000 |
(Discounts), premiums and debt costs, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,852,000 |
Debt instruments, carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 623,792,000 |
Weighted-average maturity |  |  |  |  |  |  |  |  |  |  |  | 6 years |  |  |  |  |
Mortgage Debt | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.02% | 3.02% |
Mortgage Debt | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.50% | 7.50% |
Mortgage Debt | Debt maturing in 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.14% | 3.14% |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 479,795,000 |
Mortgage Debt | Debt maturing in 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,641,000 |
Mortgage Debt | Debt maturing in 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,839,000 |
Mortgage Debt | Debt maturing in 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.11% | 5.11% |
2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,907,000 |
Mortgage Debt | Debt maturing in 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.38% | 5.38% |
2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,277,000 |
Mortgage Debt | Thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.13% | 4.13% |
Thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 116,481,000 |
Other Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 64,000,000 |
Number of CCRC issuing non-interest life care bonds | item |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 | 2 |
Number of facilities with non-interest bearing occupancy fee deposits | item |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 | 3 |
Life Care Bonds and Demand Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.50% | 4.50% |
Net proceeds from issuance of senior unsecured notes |  |  |  |  |  |  |  |  |  |  |  | $ 28,000,000 |  |  |  |  |
Other debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 92,000,000 |
RIDEA II |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of senior unsecured notes |  |  |  |  |  |  |  |  |  |  | $ 440,000,000 |  |  |  |  |  |

X
- Definition Carrying amount of healthcare facilities which are secured by mortgage debt. + References No definition available. + Details
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Period Type: | instant

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- Definition Number of healthcare facilities which are secured by mortgage debt. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The limit of the ratio of Consolidated Total Indebtedness to Consolidated Total Asset Value contained in the debt covenants. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The required minimum Fixed Charge Coverage ratio contained in the debt covenants. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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- Definition The required Minimum Consolidated Tangible Net Worth contained in the debt covenants. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The limit of the ratio of Secured Debt to Consolidated Total Asset Value contained in the debt covenants. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The limit of the ratio of Unsecured Debt to Consolidated Unencumbered Asset Value contained in the debt covenants. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the length of the debt instrument extension period. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of the outstanding balance of the debt that is denominated in a foreign currency. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition This element represents weighted average maturity of debt. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The term of a derivative instrument from the effective date until maturity. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Period of time opttion to extende for debt instrument upon the maturity date. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of continuing care retirement communities under which non-interest bearing life care bonds are issued that are refundable to the resident or resident's estate upon termination or cancellation of the agreement. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition This element represents the maximum additional borrowing capacity available under the credit facility, subject to customary conditions. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The portion of the outstanding balance of the line of credit that is denominated in a foreign currency. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Number of senior housing facilities under which non-interest bearing occupancy fee deposits are outstanding. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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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. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Period Type: | duration

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- Definition Amount, after accumulated amortization, of debt discount (premium). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28567-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | instant

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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
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X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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