Income Taxes - (Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Inventories	$ 17.9	$ 15.2
Pension benefits	19.2	15.5
Other accruals and prepayments	46.0	44.6
Lease liabilities	51.1	0.0
Stock-based compensation expense	3.0	5.4
Tax credit and loss carryforwards	152.0	141.3
Valuation allowances	(119.1)	(91.2)
Total deferred tax asset	170.1	130.8
Deferred tax liabilities:
Property, plant and equipment	(8.3)	(6.3)
Right-of-use assets	(48.2)	0.0
Goodwill and other intangible assets	(339.0)	(326.2)
Total deferred tax liability	(395.5)	(332.5)
Net deferred tax liability	$ (225.4)	$ (201.7)