Note 2. Discontinued Operations Discontinued Operations (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue	$ 0.0	$ 0.0	$ 1,042.0
Disposal Group, Including Discontinued Operation, Costs of Goods Sold	0.0	0.0	840.8
Disposal Group, Including Discontinued Operation, General and Administrative Expense	0.2	4.1	116.8
Disposal Group, Including Discontinued Operation, Other Expense	0.0
Disposal Group, Including Discontinued Operation, Other Income		0.0	(0.4)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	(0.2)	(4.1)	84.8
Discontinued Operation, Tax Effect of Discontinued Operation	(0.1)	(1.0)	30.7
Income (loss) from discontinued operations, net of provision (benefit) for income taxes of $(0.1), $(1.0), $30.7	$ (0.1)	$ (3.1)	$ 54.1

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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- Definition

Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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