Discontinued Operations Statement of Operations - Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized									$ 36.3
Disposal Group, Including Discontinued Operation, Revenue									1,042.0	$ 1,265.4	$ 1,498.5
Disposal Group, Including Discontinued Operation, Costs of Goods Sold									840.8	971.0	1,142.9
Disposal Group, Including Discontinued Operation, General and Administrative Expense									116.8	116.3	93.7
Disposal Group, Including Discontinued Operation, Other Expense									(0.4)	(1.6)	(5.2)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax									84.8	176.5	256.7
Discontinued Operation, Tax Effect of Discontinued Operation									30.7	73.1	95.2
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ (0.3)	$ (0.2)	$ 28.2	$ 26.4	$ 8.1	$ 31.1	$ 31.9	$ 32.3	54.1	103.4	$ 161.5
Discontinued Operations [Member]
Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized									$ 31.2	$ 14.2