Consolidated Statements of Cash Flows (Parenthetical)	3 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($) asset property_unit	Dec. 31, 2019 USD ($) asset property_unit	Dec. 31, 2018 USD ($) hotel	Dec. 31, 2017 USD ($) shares
Interest paid attributable to noncontrolling interest		$ 3,500,000	$ 6,900,000	$ 38,500,000
Interest paid, capitalized		3,800,000	3,900,000	0
Income taxes paid attributable to noncontrolling interest		0	0	12,000,000.0
Restricted cash	$ 54,500,000	54,500,000	$ 88,000,000.0	$ 43,600,000
Operating lease, right-of-use asset	13,600,000	13,600,000
Operating lease, liability	$ 13,600,000	13,600,000
Non-cash contribution to acquire interest in joint venture		$ 125,500,000
Ownership percentage sold of equity method investment	20.00%
Number of hotels securing loans | hotel			6
Common Stock [Member]
Issuance of shares, net (in shares) | shares				37,226,695
Axa Joint Venture [Member]
Ownership percentage sold of equity method investment		20.00%
Equity method investment, ownership percentage	80.00%	80.00%
Axa Joint Venture [Member] | Multifamily [Member]
Non-cash contribution to acquire interest in joint venture		$ 92,200,000
Ownership percentage sold of equity method investment		20.00%
Proceeds from divestiture of interest in joint venture		$ 23,000,000
Equity method investment, ownership percentage	80.00%	80.00%
Axa Joint Venture [Member] | Ireland [Member] | Multifamily [Member]
Ownership percentage sold of equity method investment		20.00%
Number of assets sold | asset	3	3
Number of units sold | property_unit	468	468