Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

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

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

	Quarter Ended March 31,
Dollar amounts in millions	2017		2016
Total stock-based compensation expense (costs of sales and general and administrative)	$	4.1	$	3.0
Income tax provision related to stock-based compensation	$	—	$	1.9
Impact on cash flow due to taxes paid related to net share settlement of equity awards	$	4.7	$	0.9