Revenue Recognition - Schedule of ASC 606 Impact on Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended													12 Months Ended
	Dec. 31, 2018	Sep. 29, 2018	[1]	Jun. 30, 2018	[2]	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	[3]	Jul. 01, 2017	[4]	Apr. 01, 2017	[5]	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net income (loss)	$ 81.5	$ (67.5)		$ 36.2		$ 80.8	$ 73.1	$ 44.5		$ (69.6)		$ 71.6		$ 131.0	$ 119.6	$ (4,012.8)
Comprehensive loss														(36.5)	$ 454.5	$ (4,079.3)
Adjustments | ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net income (loss)														(2.8)
Comprehensive loss														(2.8)
Balances without adoption of ASC 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net income (loss)														128.2
Comprehensive loss														$ (39.3)

[1] Includes of $221.8 million and of $18.0 million

[2] Includes of $53.2 million.

[3] Includes of $3.3 million, and of $4.0 million.

[4] Includes of $18.5 million, and of $135.2 million.

[5] Includes of $12.2 million, of $21.8 million, and restructuring expense of $38.7 million.