Stockholders' Deficit

6 Months Ended

Jun. 30, 2018

Compensation Related Costs [Abstract]

Stockholders' Deficit

Stockholders' Deficit

Stock Based Compensation

The following reflects total stock-based compensation expense recognized under all programs:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Related to stock options	$	7.3	$	1.3	$	8.7	$	1.5
Related to RSUs	8.3		5.8		15.7		11.5
Total	$	15.6	$	7.1	$	24.4	$	13.0