Consolidated Statement of Equity - 3 months ended Mar. 31, 2017 - 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, 2016	$ 18,458,140	$ 78,235	$ 5,287	$ 19,455,039	$ (937,473)	$ (3,610,007)	$ 3,467,059
Balance, shares at Dec. 31, 2016	528,671		528,671
Consolidated net earnings	$ 220,689					204,929	15,760
Effect of equity compensation plans	7,056		$ 9	(1,239)			8,286
Effect of equity compensation plans, shares			930
Settlement of noncontrolling interests	(789,803)			(201,797)			(588,006)
Conversion of noncontrolling interests			$ 6	17,229			(17,235)
Conversion of noncontrolling interests, shares			612
Foreign currency translation gains (losses), net	39,667				(8,369)		48,036
Unrealized gains on derivative contracts, net	2,631				2,560		71
Reallocation of equity				(22,457)			22,457
Distributions and other	(269,959)			(13)		(235,072)	(34,874)
Balance at Mar. 31, 2017	$ 17,668,421	$ 78,235	$ 5,302	$ 19,246,762	$ (943,282)	$ (3,640,150)	$ 2,921,554
Balance, shares at Mar. 31, 2017	530,213		530,213