Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Inventory valuation	$ 16.7	$ 23.4
Reserves and other accrued expenses	29.4	59.8
Net operating loss carry forwards	395.5	530.4
Tax credit carry forwards	26.7	44.5
Other	54.0	36.6
Valuation allowance	(158.8)	(119.0)
Realizable deferred tax assets	363.5	575.7
Deferred tax liabilities:
Reserves and other accrued expenses	(16.0)	0.0
Identifiable intangible assets	(352.0)	(597.1)
Other	(35.7)	(24.2)
Total deferred tax liabilities	(403.7)	(621.3)
Net deferred tax liability on balance sheet	$ (40.2)	$ (45.6)