Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Fair Value of Liabilities Measured on Recurring Basis

			Fair Value Measurements Using:
	Total Fair Value		Level 1		Level 2		Level 3
	(in millions)
As of June 30, 2013
Liabilities:
Deferred compensation	$	0.8	$	0.8	$	—	$	—
As of December 31, 2012
Liabilities:
Deferred compensation	$	1.0	$	1.0	$	—	$	—

Fair Value Measurements Not Measured on a Recurring Basis

					Fair Value Measurements Using:
	Total Carrying Value		Total Fair Value		Level 1		Level 2		Level 3
As of June 30, 2013	(in millions)
Assets:
Held-to-maturity securities	$	14.8	$	30.1	$	—	$	26.7	$	3.4
Promissory notes	$	9.0	$	15.9	$	—	$	15.9	$	—
Liabilities:
Long-term debt	$	1,459.5	$	1,523.0	$	—	$	1,523.0	$	—
As of December 31, 2012
Assets:
Held-to-maturity securities	$	14.4	$	14.4	$	—	$	14.4	$	—
Promissory notes	$	4.0	$	4.0	$	—	$	4.0	$	—
Liabilities:
Long-term debt	$	1,440.5	$	1,532.1	$	—	$	1,532.1	$	—

Land, buildings, vessels and equipment

The following table presents a summary of our land, buildings, vessels and equipment:

	June 30, 2013			December 31, 2012
	(in millions)
Land, buildings, vessels and equipment:
Land and land improvements	$	298.8		$	291.9
Buildings, vessels and improvements	1,561.5			1,539.3
Furniture, fixtures and equipment	536.2			528.0
Construction in progress	88.8			47.9
Land, buildings, vessels and equipment, gross	2,485.3			2,407.1
Less: accumulated depreciation	(750.0		)	(711.1		)
Land, buildings, vessels and equipment, net	$	1,735.3		$	1,696.0

Schedule of Complimentary Revenue

The amounts included in promotional allowances and the cost of providing such promotional allowances are as follows:

	For the three months ended June 30,				For the six months ended June 30,
	2013		2012		2013		2012
	(in millions)
Food and beverage	$	19.8	$	16.2	$	38.7	$	32.2
Lodging	8.9		7.9		17.1		15.4
Other	3.3		2.5		6.3		4.7
Total promotional allowances	$	32.0	$	26.6	$	62.1	$	52.3
Promotional allowance costs included in gaming expense	$	23.0	$	19.5	$	46.3	$	38.5

Gaming Taxes Table

	For the three months ended June 30,				For the six months ended June 30,
	2013		2012		2013		2012
	(in millions)
Gaming taxes	$	79.3	$	76.0	$	160.4	$	152.4

Pre-opening and Development Costs Table

	For the three months ended June 30,				For the six months ended June 30,
	2013		2012		2013		2012
	(in millions)
Ameristar acquisition	$	16.6	$	—	$	23.3	$	—
Other	0.6		4.2		1.5		7.0
Total pre-opening and development costs	$	17.2	$	4.2	$	24.8	$	7.0