Summary of Significant Accounting Policies (Income Tax, Shipping and Handling Costs and Advertising Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Deferred tax liabilities	$ 106.3	$ 114.6
Net current deferred tax asset	199.3
Net current deferred tax liabilities	305.6
Deferred tax assets, valuation allowance	177.1	172.1
Shipping and handling costs	114.2	118.0	$ 157.2
Advertising expense	$ 7.9	$ 10.4	$ 14.2