Consolidated Statement of Equity - 6 months ended Jun. 30, 2018 - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Distributions in Excess of Net Earnings [Member]	Non-controlling Interests [Member]
Balance at Dec. 31, 2017	$ 18,705,741	$ 68,948	$ 5,322	$ 19,363,007	$ (901,658)	$ (2,904,461)	$ 3,074,583
Balance, shares at Dec. 31, 2017	532,186		532,186
Consolidated net earnings	$ 756,950					703,465	53,485
Effect of equity compensation plans	33,681		$ 11	8,835			24,835
Effect of equity compensation plans, shares			1,117
Capital contributions	37,974						37,974
Redemption of noncontrolling interests	(23,768)			(2,792)			(20,976)
Foreign currency translation losses, net	(143,043)				(135,793)		(7,250)
Unrealized losses on derivative contracts, net	(4,156)				(4,035)		(121)
Reallocation of equity				(46,927)			46,927
Distributions and other	(636,876)			(107)		(515,245)	(121,524)
Balance at Jun. 30, 2018	$ 18,726,503	$ 68,948	$ 5,333	$ 19,322,016	$ (1,041,486)	$ (2,716,241)	$ 3,087,933
Balance, shares at Jun. 30, 2018	533,303		533,303