Note 9. Income Taxes Deferred Tax Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Deferred Tax Liabilities, Property, Plant and Equipment	$ 1,072.6	$ 1,032.2
Deferred Tax Liabilities, Partially Owned Subsidiaries	134.3	139.2
Deferred Tax Liabilities, Right-of-use Assets	20.9	18.7
Deferred Tax Liabilities, Deferred Expense, Reserves and Accruals	3.0	1.9
Deferred Tax Liabilities, Gross	1,235.6	1,192.0
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits	27.4	28.7
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Warranty Reserves	2.8	7.3
Deferred Tax Assets, Other	0.0	5.9
Deferred Tax Assets, Tax Credit Carryforwards	40.4	38.4
Deferred Tax Assets, Inventory	3.6	6.0
Deferred Tax Assets, Lease Liabilities	25.8	24.4
Deferred Tax Assets, Gross	131.3	110.7
Deferred Tax Liabilities, Net, Before Adjustments	1,104.3	1,081.3
Deferred Tax Assets, Valuation Allowance	29.5	24.4
Deferred Tax Liabilities, Net, Before Uncertain Tax Positions	1,133.8	1,105.7
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other	(0.7)	(1.1)
Deferred Tax Liabilities, Net	1,133.1	$ 1,104.6
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	0.2
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	$ 21.3