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Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Oct. 01, 2018 | Jan. 01, 2018
Statement of Stockholders' Equity [Abstract] |  |  |  |  |
Dividends per share on common stock (in usd per share) | $ 0.64 | $ 0.64 | $ 0.61 |  |
Retained earnings | $ (1,835.5) | $ (1,735.2) |  |  |
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 |
ASU 2016-16 |  |  |  |  |
Retained earnings |  |  |  |  | $ 1.0
ASU 2014-09 |  |  |  |  |
Retained earnings |  |  |  |  | $ (2.4)

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