Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Quarter Ended June 30,					Six Months Ended June 30,
Dollar amounts in millions	2016			2015		2016			2015
Total stock-based compensation expense (costs of sales and general and administrative)	$	3.2		$	2.7	$	6.2		$	5.1
Income tax benefit related to stock-based compensation	$	(4.7	)			$	(2.8	)
Impact on cash flow due to taxes paid related to net share settlement of equity awards	$	7.2		$	2.9	$	8.1		$	5.3