Schedule III - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Acquired intangible assets	$ 484,100,000
Cost for income tax purposes	2,400,000,000
Accumulated amortization	$ 21,300,000
Buildings, Useful Life	40 years
Land Improvements, Useful Life	15 years
Fixtures, Useful life	5 years