Equity and Accumulated Other Comprehensive Loss, Net (Schedule of Accumulated Other Comprehensive Loss, Net) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 11,049,450
Net current period change	2,341
Reclassification to interest expense from interest rate swaps	(979)
Ending balance	10,796,928
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(147,370)
Net current period change	(10,550)
Reclassification to interest expense from interest rate swaps	0
Ending balance	(157,920)
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	13,200
Net current period change	12,891
Reclassification to interest expense from interest rate swaps	(979)
Ending balance	25,112
Foreign currency net investment hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	25,738
Net current period change	0
Reclassification to interest expense from interest rate swaps	0
Ending balance	25,738
Accumulated other comprehensive income (loss), net
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(108,432)
Ending balance	$ (107,070)