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UNSECURED SENIOR NOTES (Details) $ in Millions	6 Months Ended
	Jun. 30, 2015	Dec. 17, 2013 USD ($)	Jun. 26, 2012 USD ($)
Senior notes 4.375% due December 15, 2023
Mortgage loans and Notes payable
Senior notes, principal amount		$ 250
Senior notes, interest rate (as a percent)		4.375%
Senior notes 4.375% due December 15, 2023 | Maximum
Mortgage loans and Notes payable
Consolidated leverage ratio	0.60
Secured debt leverage ratio	0.40
Senior notes 4.375% due December 15, 2023 | Minimum
Mortgage loans and Notes payable
Consolidated interest coverage ratio	1.50
Financial and customary covenant, minimum unencumbered asset (as a percent)	150.00%
Senior notes 4.80% due July 15, 2022
Mortgage loans and Notes payable
Senior notes, principal amount			$ 250
Senior notes, interest rate (as a percent)			4.80%
Senior notes 4.80% due July 15, 2022 | Maximum
Mortgage loans and Notes payable
Consolidated leverage ratio	0.60
Secured debt leverage ratio	0.40
Senior notes 4.80% due July 15, 2022 | Minimum
Mortgage loans and Notes payable
Consolidated interest coverage ratio	1.50
Financial and customary covenant, minimum unencumbered asset (as a percent)	150.00%

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- Definition

The interest coverage ratio permitted under the terms of a senior credit facility covenant.

+ References

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The leverage ratio permitted under the terms of a senior credit facility covenant.

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The covenant percentage permitted under the terms of a senior credit facility of unencumbered assets to unsecured indebtedness.

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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=34725769&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=6451184&loc=d3e28551-108399

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

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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



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 02



-Paragraph 22



-Article 5

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