Discontinued Operations and Disposal Groups (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2025 USD ($) subsidiaries Rate	Mar. 31, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) subsidiaries Rate	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Discontinued Operations and Disposal Groups [Abstract]
Capital Expenditure, Discontinued Operations	$ 71.7		$ 110.4
Disposal Group, Including Discontinued Operation, Depreciation and Amortization	31.8		83.5
Disposal Group including discontinued operations, Amortization	4.3		10.6
Disposal Group, Including Discontinued Operation, Asset impairments	0.2		1.0	$ 2.3	$ 1.9
Disposal Group, Including Discontinued Operation, Other Expense	(0.2)		(0.5)	(14.8)
Disposal Group, Including Discontinued Operation, Other Income					9.9
Discontinued Operation, Tax Effect of Discontinued Operation	(0.3)		(0.2)	(0.6)	(0.4)
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	1,422.5		25.7	1,404.0	36.9
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	1,422.8		25.9	1,404.6	37.3
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group Including Discontinued Operation Land	1.1			1.1		$ 1,049.5
Disposal Group, Including Discontinued Operation,, Land improvements and buildings	117.4			117.4		2,401.9
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	127.4			127.4		3,820.6
Disposal Group, Including Discontinued Operation, Furniture, fixtures and equipment	8.9			8.9		369.2
Disposal Group, Including Discontinued Operation, Accumulated depreciation	(31.1)			(31.1)		(512.6)
Disposal Group Including Discontinued Operation, Investment property, net	96.3			96.3		3,308.0
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	4.1			4.1		6.8
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net	1.9			1.9		53.9
Disposal Group, Including Discontinued Operation, Goodwill	12.0			12.0		541.7
Disposal Group, Including Discontinued Operation, Intangible Assets	1.7			1.7		236.4
Disposal Group, Including Discontinued Operation, Other Assets	5.1			5.1		267.7
Assets held for sale and discontinued operations, net (see Note 2)	121.1			121.1		4,461.7
Disposal Group, Including Discontinued Operation,, Advanced reservation deposits and rent	5.9			5.9		81.6
Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities	10.5			10.5		44.3
Disposal Group, Including Discontinued Operation, Other Liabilities	20.2			20.2		161.0
Liabilities held for sale and discontinued operations, net (see Note 2)	36.6			36.6		286.9
Disposal Group, Including Discontinued Operation, Contingent Consideration expense		$ 14.6
Gain on disposition of discontinued operations	1,422.5		25.7	1,404.0	36.9
Disposal Group, including Discontinued Operation, Depreciation, amortization and disposal on sale of assets	(0.3)		49.8	36.1	94.1
Disposal Group Including Discontinued Operation Transaction Costs	48.0		0.0	62.6	0.0
Business combination costs	0.0		0.2	0.0	0.2
Disposal Group, including Discontinued Operation, Depreciation, amortization and disposal on sale of assets	(0.3)		49.8	36.1	94.1
Disposal Group, Including Discontinued Operation, Revenue	95.1		267.8	307.8	469.8
Disposal Group, Including Discontinued Operation, Property operating and maintenance	14.8		35.9	52.2	69.6
Disposal Group, Including Discontinued Operation, Operating Expense	117.1		241.4	333.4	442.4
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	(22.0)		26.4	(25.6)	27.4
Gain on disposition of properties, net	1,445.0		0.0	1,445.0	0.0
Disposal Group, Including Discontinued Operation, Real estate tax	2.1		5.2	7.9	11.0
Disposal Group, Including Discontinued Operation, Service, retail, dining and entertainment expenses	50.0		133.7	153.9	233.4
Disposal Group, Including Discontinued Operation, General and Administrative Expense	2.3		15.6	18.4	32.2
Disposal Group, Including Discontinued Operation, Lease Income	40.0		118.8	143.1	215.2
Disposal Group, Including Discontinued Operation, Service revenue	54.8		148.1	163.1	252.6
Disposal Group, Including Discontinued Operation, Interest, brokerage commissions and other, net	0.3		$ 0.9	$ 1.6	$ 2.0
Safe Harbor Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Severance costs	25.8
Discontinued Operations, Held-for-Sale or Disposed of by Sale | Safe Harbor Business
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	1,400.0
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses	$ 5,250.0
Number of delayed consent subsidiaries | subsidiaries	15			15
Number of delayed consent subsidiaries sold | subsidiaries	6
Aggregate value of delayed consent subsidiaries sold	$ 136.7
Number of delayed consent subsidiaries subject To receipt of third-party consents | subsidiaries	9			9
Aggregate value of delayed consent subsidiaries subject to receipt of third-party consents	$ 117.5			$ 117.5
Management fee percentage | Rate	4.00%			4.00%
Disposal group, including discontinued operation, delayed consideration	$ 250.0			$ 250.0
Disposal group, including discontinued operation, management fees	0.2
Gain on disposition of discontinued operations	1,400.0
Discontinued Operations, Held-for-Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale and discontinued operations, net (see Note 2)	$ 121.1			$ 121.1		$ 4,414.5