Acquisitions - Allocation of Purchase Price and Adjustments (Details) - USD ($) $ in Millions	4 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	May 23, 2019	Jan. 01, 2019	Dec. 31, 2018	Oct. 15, 2018
Business Acquisition [Line Items]
Goodwill	$ 1,350.4	$ 1,350.4		$ 1,233.9	$ 1,228.4
Greektown Casino-Hotel
Business Acquisition [Line Items]
Cash and cash equivalents	31.1	31.1	$ 31.1
Receivables, prepaid expenses, and other current assets	14.5	14.5	15.6
Property and equipment	32.3	32.3	32.3
Goodwill	62.8	62.8	61.7
Customer relationships	3.3	3.3	3.3
Operating lease right-of-use assets	516.1	516.1	516.1
Finance lease right-of-use assets	4.2	4.2	4.2
Other assets	0.2	0.2	0.2
Total assets	855.3	855.3	855.3
Accounts payable, accrued expenses and other current liabilities	14.8	14.8	14.8
Operating lease liabilities	516.0	516.0	516.0
Finance lease liabilities	4.2	4.2	4.2
Total liabilities	535.0	535.0	535.0
Net assets acquired	320.3	320.3	320.3
Goodwill deductible for tax purposes			62.8
Measurement period adjustments
Receivables, prepaid expenses, and other current assets	(1.1)
Goodwill	1.1
Greektown Casino-Hotel | Gaming licenses
Business Acquisition [Line Items]
Indefinite-lived intangible assets	166.4	166.4	166.4
Greektown Casino-Hotel | Trade name
Business Acquisition [Line Items]
Indefinite-lived intangible assets	24.4	24.4	$ 24.4
Margaritaville Resort Casino
Business Acquisition [Line Items]
Cash and cash equivalents	10.7	10.7		10.7
Receivables, prepaid expenses, and other current assets	7.1	7.1		7.1
Property and equipment	20.7	20.7		21.7
Goodwill	40.5	40.5		39.5
Operating lease right-of-use assets	196.2	196.2		196.2
Total assets	325.6	325.6		325.6
Accounts payable, accrued expenses and other current liabilities	9.5	9.5		9.5
Operating lease liabilities	196.2	196.2		196.2
Total liabilities	205.7	205.7		205.7
Net assets acquired	119.9	119.9		119.9
Goodwill deductible for tax purposes				40.5
Measurement period adjustments
Property and equipment		(1.0)
Goodwill		1.0
Margaritaville Resort Casino | Customer relationships
Business Acquisition [Line Items]
Customer relationships	2.3	2.3		2.3
Margaritaville Resort Casino | Gaming licenses
Business Acquisition [Line Items]
Indefinite-lived intangible assets	48.1	48.1		$ 48.1
Pinnacle
Business Acquisition [Line Items]
Cash and restricted cash	124.2	124.2				$ 124.2
Assets held for sale	667.5	667.5				667.0
Other current assets	81.1	81.1				80.6
Goodwill	238.2	238.2				219.5
Customer relationships	22.4	22.4				22.4
Other assets	38.9	38.9				38.9
Total assets	6,811.4	6,811.4				6,799.6
Long-term financing obligation, including current portion	3,432.5	3,432.5				3,427.0
Other current liabilities	206.1	206.1				200.6
Deferred tax liabilities	340.0	340.0				339.2
Other long-term liabilities	16.6	16.6				16.6
Total liabilities	3,995.2	3,995.2				3,983.4
Net assets acquired	2,816.2	2,816.2				2,816.2
Measurement period adjustments
Receivables, prepaid expenses, and other current assets		0.5
Assets held for sale		0.5
Goodwill		18.7
Total assets		11.8
Long-term financing obligation, including current portion		5.5
Other current liabilities		5.5
Deferred tax liabilities		0.8
Total liabilities		11.8
Pinnacle | Gaming licenses
Business Acquisition [Line Items]
Indefinite-lived intangible assets	1,067.6	1,067.6				1,046.0
Measurement period adjustments
Indefinite-lived intangible assets		21.6
Pinnacle | Trademarks
Business Acquisition [Line Items]
Indefinite-lived intangible assets	298.0	298.0				298.0
Property and equipment - non-Master Leases | Pinnacle
Business Acquisition [Line Items]
Property and equipment	318.6	318.6				318.9
Measurement period adjustments
Property and equipment		(0.3)
Property and equipment - Master Leases | Pinnacle
Business Acquisition [Line Items]
Property and equipment	$ 3,954.9	3,954.9				$ 3,984.1
Measurement period adjustments
Property and equipment		$ (29.2)