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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Components of Income Tax Provision From Continuing Operations

The components of the income tax provision from continuing operations for the years ended December 31 are as follows:

	2014				2013				2012
Current:
Federal	$	220.9			$	189.7			$	146.9
State	32.2				28.9				25.1
Federal and state deferred	9.5				13.4				27.1
Change in valuation allowance, net	—				(3.7		)		0.1
Adjustments and settlements	(0.1		)		0.3				0.3
Income tax provision	$	262.5			$	228.6			$	199.5

Reconciliation of Income Tax Provision

A reconciliation of the income tax provision calculated using the statutory federal income tax rate to our income tax provision from continuing operations for the years ended December 31 is as follows:

	2014				%			2013				%			2012				%
Income tax provision at statutory rate	$	238.8			35.0			$	211.6			35.0			$	180.9			35.0
Non-deductible expenses (income), net	1.3				0.2			(0.6		)		(0.1	)		(0.2		)		—
State income taxes, net of federal benefit	23.2				3.4			21.7				3.6			18.8				3.6
	263.3				38.6			232.7				38.5			199.5				38.6
Change in valuation allowance, net	—				—			(3.7		)		(0.6	)		0.1				—
Adjustments and settlements	(0.1		)		—			0.3				—			0.3				0.1
Other, net	(0.7		)		(0.1	)		(0.7		)		(0.1	)		(0.4		)		(0.1	)
Income tax provision	$	262.5			38.5			$	228.6			37.8			$	199.5			38.6

Deferred Income Tax Asset and Liability Components

Deferred income tax asset and liability components at December 31 are as follows:

	2014				2013
Deferred income tax assets:
Inventory	$	28.9			$	24.6
Receivable reserves	3.0				3.0
Warranty, chargeback, and self-insurance liabilities	57.8				49.2
Other accrued liabilities	25.1				21.6
Deferred compensation	24.0				19.7
Stock-based compensation	26.8				24.1
Loss carryforwards—federal and state	7.2				10.5
Other, net	13.2				12.7
Total deferred income tax assets	186.0				165.4
Valuation allowance	(2.5		)		(2.7		)
Deferred income tax assets, net of valuation allowance	183.5				162.7
Deferred income tax liabilities:
Long-lived assets (intangible assets and property)	(233.6		)		(200.2		)
Other, net	(19.2		)		(21.3		)
Total deferred income tax liabilities	(252.8		)		(221.5		)
Net deferred income tax assets (liabilities)	$	(69.3	)		$	(58.8	)

Reconciliation of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	2014				2013				2012
Balance at January 1	$	4.8			$	6.8			$	6.4
Additions based on tax positions related to the current year	—				—				—
Additions for tax positions of prior years	0.9				0.8				0.5
Reductions for tax positions of prior years	(0.1		)		(0.2		)		—
Reductions for expirations of statute of limitations	(0.4		)		(2.2		)		—
Settlements	(0.3		)		(0.4		)		(0.1		)
Balance at December 31	$	4.9			$	4.8			$	6.8

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of the change in unrecognized tax benefits.

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