Note 1. Summary of Significant Accounting Policies Warranties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Product Warranty Liability [Line Items]
Standard Product Warranty Accrual, Decrease for Payments	$ (3.8)	$ (2.8)	$ (4.8)
Standard Product Warranty Accrual, Period Increase (Decrease)	4.5	0.1	4.8
Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties	0.0	0.0	(1.9)
Standard Product Warranty Accrual	$ 8.1	$ 7.4	$ 10.1	$ 12.0
Minimum [Member]
Product Warranty Liability [Line Items]
Product Warranty Period	1 year
Maximum [Member]
Product Warranty Liability [Line Items]
Product Warranty Period	5 years