Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Oct. 01, 2018	Dec. 31, 2018		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
Statement of Stockholders' Equity [Abstract]
Dividends per share on common stock (in dollars per share)				$ 0.64	$ 0.64	$ 0.64
Retained earnings		$ (1,835.5)		$ (1,998.5)	$ (1,835.5)
ASU 2018-02
Tax Cuts And Jobs Act Of 2017 reclassification from accumulated other comprehensive income to retained earnings Tax Effect	$ 13.4	$ (13.4)	[1]
ASU 2016-16
Retained earnings							$ 1.0
ASU 2014-09
Retained earnings							$ (2.4)

[1] Due to the adoption of ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory and ASU 2014-09, Revenue from Contracts with Customers (Topic 606) as of January 1, 2018, the Company recorded decreases to retained earnings of $1.0 million and $2.4 million, respectively. Additionally, due to the adoption of ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income as of October 1, 2018, the Company recorded an increase to retained earnings of $13.4 million from accumulated other comprehensive loss.