Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Non-cash Investing and Financing Activities

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

	Three Months
	Ended March 31,
	2018		2017
Accounts payable related to construction in progress	$	16.6	$	12.5
Receivable and reduction of real estate assets, net - related to hurricane casualty		5.7		—
Dividends declared		78.7		75.4
Conversion of Operating Partnership Units		0.9	—