Income Taxes (Tables)

3 Months Ended

Mar. 31, 2016

Income Tax Disclosure [Abstract]

Reconciliation between the statutory U.S. Federal income tax rate and the Company's effective income tax rate on income before income taxes

The following is a reconciliation between the statutory U.S. federal income tax rate and the Company’s effective income tax rate on income before income taxes:

	Three Months Ended March 31,
	2016		2015
Statutory rate	35.0	%	35.0	%
State taxes	1.1		1.2
Domestic production activities deduction	—		(2.1	)
Noncontrolling interest in partially-owned subsidiaries	(1.3	)	(1.0	)
Other, net	1.2		0.4
Effective rate	36.0	%	33.5	%

Change in unrecognized tax benefits

The change in unrecognized tax benefits for the three months endedMarch 31, 2016 and 2015 was as follows:

	Three Months Ended March 31,
	2016			2015
	(in millions)
Beginning balance	$	65.2		$	62.3
Additions for tax positions related to the current year	1.5			1.3
Additions for tax positions of prior years	1.0			—
Reductions for tax positions of prior years	(0.1		)	(0.1		)
Settlements	—			(0.2		)
Ending balance	$	67.6		$	63.3