Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income		$ 321.1	$ 212.1	$ 138.0
Adjustments to reconcile net income to net cash provided by operating activities:
Net gain from sale of real estate		(434.3)	(376.1)	(258.0)
Gain on sale of a business		0.0	(40.4)	0.0
Depreciation and amortization		187.6	206.1	212.5
Above/below and straight-line rent amortization		(4.6)	(14.6)	(10.2)
Provision for (benefit from) deferred income taxes		26.7	39.3	(24.5)
Amortization of loan fees		9.3	13.5	12.3
Amortization of discount and accretion of premium on senior notes payable		1.6	1.7	0.4
Unrealized net (gains) losses on derivatives		(5.9)	(11.7)	11.1
Income from unconsolidated investments		(179.7)	(78.7)	(77.8)
Accretion of interest income on loans		(0.1)	(0.6)	(12.1)
Stock compensation expense		30.2	37.1	38.2
Deferred compensation		3.8	0.0	0.0
Operating distributions from unconsolidated investments		74.1	61.4	85.7
Operating distributions from loans		0.0	0.6	6.4
Change in assets and liabilities:
Accounts receivable		1.0	1.9	(13.9)
Other assets		(25.8)	(0.6)	(6.1)
Accrued expenses and other liabilities		(24.5)	42.1	(29.0)
Net cash (used in) provided by operating activities		(19.5)	93.1	73.0
Cash flows from investing activities:
Issuance of loans		(2.7)	(2.2)
Proceeds from collection of loans		0.6	5.8	16.9
Net proceeds from sale of consolidated real estate		701.0	1,386.1	659.1
Net proceeds from sale of a business			43.4
Purchases of consolidated real estate		(210.9)	(355.8)	(567.6)
Capital expenditures to real estate		(191.1)	(216.0)	(246.7)
Nonrefundable escrow deposits		0.0	(5.0)	0.0
Investment in marketable securities			(0.2)	(0.8)
Proceeds from sale of marketable securities		0.0	7.4	1.1
Investing distributions from unconsolidated investments		115.0	63.7	133.4
Contributions to unconsolidated investments		(266.0)	(396.1)	(79.9)
Proceeds from settlement of foreign currency derivative contracts		33.4	10.7	(2.8)
Purchases of foreign currency derivative contracts		0.0	(0.6)	(0.4)
Additions to development project asset		(1.2)	(29.1)	(19.4)
Proceeds from development project asset		4.2	81.0	36.9
Net cash provided by (used in) investing activities		182.3	593.1	(70.2)
Cash flow from financing activities:
Borrowings under senior notes payable		0.0	246.6	0.0
Repayment of senior notes payable		0.0	0.0	(55.0)
Costs associated with KWE Transaction		0.0	0.0	(55.8)
Borrowings under line of credit/term loan		125.0	225.0	800.0
Repayment of line of credit/term loan		(200.0)	(450.0)	(500.0)
Borrowings under mortgage debt		488.6	725.0	848.3
Repayment of mortgage debt		(391.4)	(866.8)	(684.7)
Payment of loan fees		(4.8)	(9.5)	(9.5)
Repurchase of common stock		(20.7)	(177.9)	(67.7)
Issuance of preferred stock		295.2	0.0	0.0
Cash paid to acquire noncontrolling interest in KWE		0.0	0.0	(719.8)
Common stock dividends paid		(114.9)	(111.2)	(59.2)
Preferred stock dividends paid		(2.6)	0.0	0.0
KWE closing dividend		0.0	(17.2)	0.0
Repayment of shareholder loans to noncontrolling interests		(11.2)	0.0	0.0
Acquisition of noncontrolling interests			0.0	(3.3)
Contributions from noncontrolling interests		15.0	23.2	47.4
Distributions to noncontrolling interests		(264.0)	(116.0)	(106.0)
Net cash used in financing activities		(85.8)	(528.8)	(565.3)
Effect of currency exchange rate changes on cash and cash equivalents		8.9	(20.7)	28.1
Net change in cash and cash equivalents		85.9	136.7	(534.4)
Cash and cash equivalents, beginning of year		488.0	351.3	885.7
Cash and cash equivalents, end of year		573.9	488.0	351.3
Cash paid for:
Interest	[1],[2]	211.1	225.3	206.7
Income taxes	[3]	$ 20.6	$ 6.6	$ 16.1

[1] Excludes $3.8 million and $3.9 million of capitalized interest for the years ended December 31, 2019 and 2018. None during the year ended December 31, 2017.

[2] $3.5 million, $6.9 million, and $38.5 million attributable to noncontrolling interests for the years ended December 31, 2019, 2018, and 2017.

[3] $12.0 million attributable to noncontrolling interests for the year ended December 31, 2017, none during the years ended December 31, 2019 and 2018.