Income Taxes (Tables)

6 Months Ended

Jun. 30, 2015

Income Taxes

Changes in Unrecognized Tax Benefits (Table)

	For the six months ended			For the year ended
	June 30, 2015			December 31, 2014
	(in millions)
Balance at beginning of period	$	172.4		$	108.9
Additions based on tax positions related to the current year	6.5			12.9
Additions for tax positions of prior years	45.2			62.5
Reductions for tax positions related to the current year	(4.4		)	(8.4		)
Reductions for tax positions of prior years	(2.6		)	(0.2		)
Settlements	—			(3.3		)
Balance at end of period (1)	$	217.1		$	172.4

(1) Of this amount, $80.1 million, if recognized, would reduce the 2015 effective income tax rate. We recognize interest and penalties related to uncertain tax positions in operating expenses.