Income Taxes (Tables)

6 Months Ended

Jun. 30, 2014

Income Tax Disclosure [Abstract]

Reconciliation between the statutory United States Federal income tax rate and the Company's effective income tax rate from continuing operations

The following is a reconciliation between the statutory U.S. Federal income tax rate and the Company’s effective income tax rate on income from continuing operations:

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Statutory rate	35.0	%	35.0	%	35.0	%	35.0	%
State taxes	0.9		2.1		0.9		2.1
Domestic production activities deduction	(2.2	)	(1.5	)	(2.2	)	(1.0	)
Noncontrolling interest in partially-owned subsidiaries	(1.1	)	(1.6	)	(1.2	)	(0.8	)
Tax assessments and settlements	—		1.2		—		0.6
Other, net	—		(0.6	)	0.1		(0.5	)
Effective rate	32.6	%	34.6	%	32.6	%	35.4	%

Change in unrecognized tax benefits

The change in unrecognized tax benefits for the six months endedJune 30, 2014 and 2013 was as follows:

	Six Months Ended June 30,
	2014			2013
	(in millions)
Beginning balance	$	55.0		$	48.7
Additions for tax positions related to the current year	2.6			2.3
Additions for tax positions of prior years	—			0.9
Reductions for tax positions of prior years	(0.1		)	—
Expiration of statute of limitations	—			(0.1		)
Ending balance	$	57.5		$	51.8