Consolidated Statement of Equity - 6 months ended Jun. 30, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Distributions in Excess of Net Earnings [Member]	Non-controlling Interests [Member]
Balance at Dec. 31, 2015	$ 18,420,836	$ 78,235	$ 5,245	$ 19,302,367	$ (791,429)	$ (3,926,483)	$ 3,752,901
Balance, shares at Dec. 31, 2015	524,512		524,512
Consolidated net earnings	$ 518,596					486,809	31,787
Effect of equity compensation plans	45,880		$ 10	33,804			12,066
Effect of equity compensation plans, shares			1,034
Issuance of units related to acquisitions	3,162						3,162
Settlement of noncontrolling interests	(2,128)			851			(2,979)
Conversion of noncontrolling interests			$ 10	25,424			(25,434)
Conversion of noncontrolling interests, shares			915
Capital contributions	825						825
Foreign currency translation gains (losses), net	(21,600)				(35,436)		13,836
Unrealized losses on derivative contracts, net	(21,818)				(21,214)		(604)
Reallocation of equity				(960)			960
Distributions and other	(660,719)			301		(445,343)	(215,677)
Balance at Jun. 30, 2016	$ 18,283,034	$ 78,235	$ 5,265	$ 19,361,787	$ (848,079)	$ (3,885,017)	$ 3,570,843
Balance, shares at Jun. 30, 2016	526,461		526,461