Other Income (Expense), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Nonoperating Income (Expense) [Abstract]
Kansas Development Finance Authority bond	$ 3.0	$ 3.7	$ 3.8
Rental and miscellaneous income	0.2	0.2	0.2
Pension Income (Expense) without Service Cost	(36.8)	19.5	34.3
Interest Income, Other	10.0	12.9	8.0
Other Income	(3.1)	0.4	0.4
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	(10.5)	(19.0)	(35.3)
Gain (Loss) on Sale of Accounts Receivable	(8.9)	(24.7)	(16.5)
Foreign currency losses	(27.0)	(12.3)	(1.9)
Gain (Loss) Related to Litigation Settlement	0.0	13.5
Total Other (Expense) Income, net	(77.8)	$ (5.8)	$ (7.0)
Accounts Receivable, Credit Loss Expense (Reversal)	$ (4.7)