Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions		9 Months Ended
	Jan. 01, 2018	Sep. 30, 2018
Accumulated Deficit | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect on retained earnings, net of tax	$ 324.7
Cumulative effect on retained earnings, tax	63.9
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from contract with customers, terms of payment (in days)		30 days
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from contract with customers, terms of payment (in days)		90 days
Accumulated Other Comprehensive Loss
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of taxes effects upon adoption of ASU 2018-02, net		$ 5.7
Accumulated Other Comprehensive Loss | Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of taxes effects upon adoption of ASU 2018-02, net	5.7
Accumulated Deficit | Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of taxes effects upon adoption of ASU 2018-02, net	$ (5.7)