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Note 1. Summary of Significant Accounting Policies Product Warranty (Tables)
12 Months Ended
Dec. 31, 2021
Guarantees and Product Warranties [Abstract]  
Schedule of Product Warranty Liability [Table Text Block] The changes in the accruals for warranties for the years ended December 31, 2021, 2020, and 2019 are as follows:
 Year Ended December 31,
202120202019
 (in millions)
Beginning balance$11.3 $7.5 $6.8 
Warranty costs incurred(7.4)(2.0)(3.4)
Warranty originations and revisions0.1 6.0 4.1 
Warranty expirations(0.9)(0.2)— 
Ending balance$3.1 $11.3 $7.5