Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Non-cash Investing and Financing Activities

Non-cash investing and financing activities are summarized as follows (in millions):

	For the Year Ended December 31,
	2016		2015		2014
Accounts payable related to construction in progress	$	13.3	$	31.6	$	25.7
Dividends declared		75.2		68.6		61.5
Mortgages assumed from acquisitions		—		33.7		293.3
Issuance of Operating Partnership Units ("OP Units")		—		—		18.3
Redemption of OP Units		—		18.3		—
Elimination of a previously held equity interest (Note 3)		—		1.4		2.5
Preferred equity interest and mezzanine loan applied to purchase    price of acquired properties		—		—		51.8
Reclassification adjustment of foreign currency translation (Note 11)		—		—		21.8
Write-off of preferred share original issuance costs		—		—		1.9

Estimated Useful Lives of Assets

Depreciation and amortization is recorded on a straight-line basis over the estimated useful lives of the assets as follows:

Buildings	Useful lives, 20 to 31.5 years
Building improvements and fixtures	Useful lives, ranging from 5 to 20 years
Tenant improvements	Shorter of economic life or lease terms

Schedule of Fee and Other Income from Continuing Operations

Fee and other income was composed of the following (in thousands):

	For the Year Ended December 31,
	2016		2015		2014
Management and other fee income	$	36,298	$	32,971	$	31,907
Ancillary and other property income		18,678		19,038		24,288
Lease termination fees		3,512		2,774		4,085
Other		80		565		621
Total fee and other income	$	58,568	$	55,348	$	60,901