Note 16. Financial Statements for Guarantors of Senior Notes Income Statements for Guarantors of Senior Notes (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Guarantor Obligations [Line Items]
Revenues	$ 850.7	$ 813.6	$ 736.0	$ 604.8	$ 735.0	$ 606.9	$ 634.0	$ 533.2	$ 3,005.1	$ 2,509.1	$ 2,397.4
Cost of Goods and Services Sold	674.7	649.1	578.5	463.4	590.5	466.5	481.9	399.9	2,365.7	1,938.8	1,775.2
Selling, General and Administrative Expense	71.3	62.1	69.8	59.6	72.0	75.6	75.6	73.4	262.8	296.6	339.3
Gain (Loss) on Disposition of Property Plant Equipment	7.2	17.9	19.3	10.0	17.3	10.4	11.5	2.2	54.4	41.4	85.4
Restructuring Charges	14.7	0.0	0.0	0.0					14.7	0.0	0.0
Costs and Expenses									2,588.8	2,194.0	2,029.1
Operating Income (Loss)	97.2	120.3	107.0	91.8	89.8	75.2	88.0	62.1	416.3	315.1	368.3
Other Nonoperating Expense									215.6	163.5	172.9
Income (Loss) from Subsidiaries, Net of Tax									0.0	0.0	0.0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	42.6	66.3	51.7	40.1	45.7	35.2	49.8	20.9	200.7	151.6	195.4
Income Tax Expense (Benefit)	20.3	18.2	14.1	8.9	17.7	6.7	12.5	5.7	61.5	42.6	(414.8)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	22.3	48.1	37.6	31.2	28.0	28.5	37.3	15.2	139.2	109.0	610.2
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(0.8)	(0.4)	(0.8)	(1.1)	(0.3)	(0.2)	28.2	26.4	(3.1)	54.1	103.4
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	21.5	47.7	36.8	30.1	27.7	28.3	65.5	41.6	136.1	163.1	713.6
Net Income (Loss) Attributable to Noncontrolling Interest	(0.1)	(1.3)	0.4	(0.5)	0.4	0.6	1.4	1.4	(1.5)	3.8	11.1
Net Income (Loss) Attributable to Parent	$ 21.6	$ 49.0	$ 36.4	$ 30.6	$ 27.3	$ 27.7	$ 64.1	$ 40.2	137.6	159.3	702.5
Other Comprehensive Income (Loss), Net of Tax									(35.0)	(13.2)	11.3
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									101.1	149.9	724.9
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									(0.2)	5.2	13.7
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									101.3	144.7	711.2
Consolidation, Eliminations [Member]
Guarantor Obligations [Line Items]
Revenues									(282.5)	(301.7)	(296.4)
Cost of Goods and Services Sold									(323.1)	(333.0)	(320.9)
Selling, General and Administrative Expense									0.0	0.0	0.0
Gain (Loss) on Disposition of Property Plant Equipment									0.0	0.0	0.0
Restructuring Charges									0.0
Costs and Expenses									(323.1)	(333.0)	(320.9)
Operating Income (Loss)									40.6	31.3	24.5
Nonoperating Income (Expense)									(0.5)	0.0	0.0
Income (Loss) from Subsidiaries, Net of Tax									(258.8)	(340.9)	(676.3)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									(217.7)	(309.6)	(651.8)
Income Tax Expense (Benefit)									(26.8)	(16.4)	(23.5)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									(190.9)	(293.2)	(628.3)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									0.0	0.0	0.0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									(190.9)	(293.2)	(628.3)
Net Income (Loss) Attributable to Noncontrolling Interest									(1.5)	3.8	11.1
Net Income (Loss) Attributable to Parent									(189.4)	(297.0)	(639.4)
Other Comprehensive Income (Loss), Net of Tax									0.0	0.0	0.0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									(190.9)	(293.2)	(628.3)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									(0.2)	5.2	13.7
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									(190.7)	(298.4)	(642.0)
Parent Company [Member] | Reportable Legal Entities [Member]
Guarantor Obligations [Line Items]
Revenues									0.0	0.0	0.0
Cost of Goods and Services Sold									2.9	2.1	3.0
Selling, General and Administrative Expense									102.4	141.7	166.9
Gain (Loss) on Disposition of Property Plant Equipment									(0.3)	1.0	1.1
Restructuring Charges									2.4
Costs and Expenses									108.0	142.8	168.8
Operating Income (Loss)									(108.0)	(142.8)	(168.8)
Nonoperating Income (Expense)									(82.5)	(70.3)	(158.6)
Income (Loss) from Subsidiaries, Net of Tax									193.5	246.8	617.0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									168.0	174.3	606.8
Income Tax Expense (Benefit)									27.3	(1.0)	(87.0)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									140.7	175.3	693.8
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									(3.1)	(16.0)	8.7
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									137.6	159.3	702.5
Net Income (Loss) Attributable to Noncontrolling Interest									0.0	0.0	0.0
Net Income (Loss) Attributable to Parent									137.6	159.3	702.5
Other Comprehensive Income (Loss), Net of Tax									(26.7)	(5.8)	8.3
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									110.9	153.5	710.8
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									0.0	0.0	0.0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									110.9	153.5	710.8
Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Guarantor Obligations [Line Items]
Revenues									2,138.9	1,817.9	1,738.0
Cost of Goods and Services Sold									1,802.2	1,545.2	1,389.2
Selling, General and Administrative Expense									105.7	113.0	129.7
Gain (Loss) on Disposition of Property Plant Equipment									24.4	17.6	71.0
Restructuring Charges									0.2
Costs and Expenses									1,883.7	1,640.6	1,447.9
Operating Income (Loss)									255.2	177.3	290.1
Nonoperating Income (Expense)									84.2	81.3	127.2
Income (Loss) from Subsidiaries, Net of Tax									46.6	74.6	55.5
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									217.6	170.6	218.4
Income Tax Expense (Benefit)									60.3	48.8	(310.3)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									157.3	121.8	528.7
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									0.0	0.0	0.0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									157.3	121.8	528.7
Net Income (Loss) Attributable to Noncontrolling Interest									0.0	0.0	0.0
Net Income (Loss) Attributable to Parent									157.3	121.8	528.7
Other Comprehensive Income (Loss), Net of Tax									0.0	(0.4)	0.2
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									157.3	121.4	528.9
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									0.0	0.0	0.0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									157.3	121.4	528.9
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Guarantor Obligations [Line Items]
Revenues									1,148.7	992.9	955.8
Cost of Goods and Services Sold									883.7	724.5	703.9
Selling, General and Administrative Expense									54.7	41.9	42.7
Gain (Loss) on Disposition of Property Plant Equipment									30.3	22.8	13.3
Restructuring Charges									12.1
Costs and Expenses									920.2	743.6	733.3
Operating Income (Loss)									228.5	249.3	222.5
Nonoperating Income (Expense)									214.4	152.5	204.3
Income (Loss) from Subsidiaries, Net of Tax									18.7	19.5	3.8
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest									32.8	116.3	22.0
Income Tax Expense (Benefit)									0.7	11.2	6.0
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									32.1	105.1	16.0
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									0.0	70.1	94.7
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest									32.1	175.2	110.7
Net Income (Loss) Attributable to Noncontrolling Interest									0.0	0.0	0.0
Net Income (Loss) Attributable to Parent									32.1	175.2	110.7
Other Comprehensive Income (Loss), Net of Tax									(8.3)	(7.0)	2.8
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest									23.8	168.2	113.5
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest									0.0	0.0	0.0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									$ 23.8	$ 168.2	$ 113.5