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Stockholders' Equity - Common Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions			12 Months Ended
	Sep. 12, 2017	Mar. 07, 2017	Dec. 29, 2019	Dec. 31, 2017	Nov. 30, 2017
Class of Stock [Line Items]
Proceeds (expenses) from the issuance of common stock			$ 0.0	$ 269.1
Net proceeds used to pay-off debt	$ 269.1
7% Senior Notes due 2019 | Senior notes
Class of Stock [Line Items]
Stated interest rate			7.00%
Reacquisition price	$ 135.5				$ 385.2
Common Stock
Class of Stock [Line Items]
Common stock sold (in shares)	16.1	11.9		28.0
Purchase price of common stock sold (dollars per share)	$ 12.25	$ 7.25
Gross proceeds from sell of stock	$ 283.5

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