Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

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,
	2021		2020		2019
Consolidation of the net assets (excluding mortgages as disclosed    below) of previously unconsolidated joint ventures	$	132.3	$	272.6	$	—
Acquisition of non-controlling interest		2.1		—		—
Joint venture investments related to consolidation of net assets		11.6		86.4		—
Mortgages assumed, of previously unconsolidated joint ventures		73.9		196.6		—
Mortgages assumed, shopping center acquisitions		17.9		—		9.1
Accounts payable related to construction in progress		13.4		6.3		11.0
Tax receivable		2.1		—		—
Assumption of buildings due to ground lease terminations		—		3.0		—
Dividends declared, but not paid		28.2		14.8		44.0
Write-off of preferred share original issuance costs		5.1		—		7.2

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, ranging from 31.5 to 40 years
Building improvements and fixtures	Useful lives, ranging from 3 to 20 years
Tenant improvements	Shorter of economic life or lease terms