Carrying amount of healthcare facilities which are secured by mortgage debt.

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Number of healthcare facilities which are secured by mortgage debt.

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The portion of the outstanding balance of the debt that is denominated in a foreign currency.

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The portion of the outstanding balance of the line of credit that is denominated in a foreign currency.

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The number of properties held for sale at the reporting date.

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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.

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Contractual interest rate for funds borrowed, under the debt agreement.

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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.

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Amount, after accumulated amortization, of debt discount (premium).

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Weighted average interest rate of debt outstanding.

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Gross amount of debt extinguished.

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No definition available.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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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.

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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.

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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.

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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.

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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.

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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.

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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 remainder of the 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.

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The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Debt - Mortgage Debt (Details) $ in Thousands, £ in Millions	1 Months Ended		3 Months Ended	6 Months Ended
	Jul. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($) facility	Jun. 30, 2017 GBP (£) facility	Dec. 31, 2016 USD ($) property
Debt Instrument
Total debt before discount, net				$ 7,445,960
(Discounts), premiums and debt costs, net				(55,435)
Debt instruments, carrying amount				7,390,525
Other debt				94,801		$ 92,385
Debt maturing in 2017
Debt Instrument
2017				1,685
Debt maturing in 2018
Debt Instrument
2018				139,823
Debt maturing in 2019
Debt Instrument
2019				673,096
Debt maturing in 2020
Debt Instrument
2020				803,758
Debt maturing in 2021
Debt Instrument
2021				1,211,117
Thereafter
Debt Instrument
Thereafter				4,616,481
Bank Line of Credit
Debt Instrument
Total debt before discount, net				136,311
Debt instruments, carrying amount				$ 136,311
Line of credit, portion denominated in GBP \| £					£ 105
Weighted-average interest rate (as a percent)				1.63%	1.63%
Bank Line of Credit \| Debt maturing in 2018
Debt Instrument
2018				$ 136,311
Term loans
Debt Instrument
Total debt before discount, net				219,396
(Discounts), premiums and debt costs, net				(564)
Debt instruments, carrying amount				218,832
Term loans, portion denominated in GBP \| £					£ 169
Term loans \| Debt maturing in 2019
Debt Instrument
2019				219,396
Unsecured Debt
Debt Instrument
Total debt before discount, net				6,950,000
(Discounts), premiums and debt costs, net				(60,955)
Debt instruments, carrying amount				$ 6,889,045
Weighted-average interest rate (as a percent)				4.29%	4.29%
Weighted-average maturity				6 years
Unsecured Debt \| Minimum
Debt Instrument
Percentage of stated interest rate				2.79%	2.79%
Unsecured Debt \| Maximum
Debt Instrument
Percentage of stated interest rate				6.88%	6.88%
Unsecured Debt \| Debt maturing in 2017
Debt Instrument
2017				$ 0
Unsecured Debt \| Debt maturing in 2019
Debt Instrument
2019				450,000
Unsecured Debt \| Debt maturing in 2020
Debt Instrument
2020				800,000
Unsecured Debt \| Debt maturing in 2021
Debt Instrument
2021				1,200,000
Unsecured Debt \| Thereafter
Debt Instrument
Thereafter				$ 4,500,000
Mortgage Debt
Debt Instrument
Number of healthcare facilities used to secure debt \| facility				16	16
Debt instrument, collateral, healthcare facilities carrying value				$ 306,000
Cash distribution		$ 472,000
Total debt before discount, net				140,253
(Discounts), premiums and debt costs, net				6,084
Debt instruments, carrying amount				$ 146,337
Weighted-average interest rate (as a percent)				4.23%	4.23%
Weighted-average maturity				20 years
Mortgage Debt \| Minimum
Debt Instrument
Percentage of stated interest rate				2.99%	2.99%
Mortgage Debt \| Maximum
Debt Instrument
Percentage of stated interest rate				5.91%	5.91%
Mortgage Debt \| Debt maturing in 2017
Debt Instrument
2017				$ 1,685
Mortgage Debt \| Debt maturing in 2018
Debt Instrument
2018				3,512
Mortgage Debt \| Debt maturing in 2019
Debt Instrument
2019				3,700
Mortgage Debt \| Debt maturing in 2020
Debt Instrument
2020				3,758
Mortgage Debt \| Debt maturing in 2021
Debt Instrument
2021				11,117
Mortgage Debt \| Thereafter
Debt Instrument
Thereafter				116,481
Life Care Bonds and Demand Notes
Debt Instrument
Other debt				$ 95,000
Senior housing triple-net
Debt Instrument
Number of properties classified as held for sale \| property						64
Senior Notes \| Subsequent event \| 5.375% Senior Notes due 2021
Debt Instrument
Percentage of stated interest rate	5.375%
Amount of debt repurchased	$ 500,000
Loss on debt extinguishment			$ 54,000