Correction of Prior Period Financial Statements (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended			6 Months Ended
	Apr. 01, 2017	Jun. 30, 2017	Apr. 01, 2017	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax provision (benefit)	$ (266.0)	$ 4.7	$ (263.8)	$ (37.6)	$ (97.4)
Income (loss) from continuing operations, net of income taxes				(223.2)	(390.9)
Net income (loss)				(226.2)	(397.3)
Net loss attributable to common stockholders				$ (227.9)	$ (399.0)
Basic and diluted EPS - continuing operations (in dollars per share)				$ (12.30)	$ (21.47)
Basic and Diluted EPS - Loss attributable to common stockholders (in dollars per share)				$ (12.46)	$ (21.82)
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax provision (benefit)				$ (30.0)	$ (95.8)
Income (loss) from continuing operations, net of income taxes				(230.8)	(392.5)
Net income (loss)				(233.8)	(398.9)
Net loss attributable to common stockholders				$ (235.5)	$ (400.6)
Basic and diluted EPS - continuing operations (in dollars per share)				$ (12.71)	$ (21.56)
Basic and Diluted EPS - Loss attributable to common stockholders (in dollars per share)				$ (12.87)	$ (21.91)
Incorrect Use of Deferred Tax Liabilities in Assessment of Valuation Allowances in 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accumulated deficit						$ 156.3
Deferred income tax liabilities						$ 156.3
Incorrect Utilization
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred income tax liabilities							$ 251.3