Financial Information for Subsidiary and Guarantor Parent (Cash Flow) (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Statement of Cash Flows
Cash flows provided by (used in) operating activities	$ (104.4)	$ 35.0
Investing Activities:
Purchases of property, plant and equipment	(51.3)	(70.6)
Net receipts/(payments) on intercompany activity	0.0	0.0
Proceeds from sale of businesses, net of transaction costs	33.4	0.0
Proceeds from disposal of property, plant and equipment	29.4	1.0
Other	(0.1)	(0.2)
Cash provided by (used in) investing activities	11.4	(69.8)
Financing Activities:
Borrowings on long-term debt	0.0	7.1
Payments on long-term debt and finance leases	(3.3)	(2.8)
Net borrowings under credit facilities	5.4	3.4
Net receipts/(payments) on intercompany activity	0.0	0.0
Sales to noncontrolling interests	0.0	14.4
Shares repurchased for income tax withholding on share-based compensation and other	(9.9)	(6.5)
Cash (used in) provided by financing activities	(7.8)	15.6
Decrease in cash and cash equivalents	(100.8)	(19.2)
Reportable Legal Entities \| Parent Company
Statement of Cash Flows
Cash flows provided by (used in) operating activities	(56.2)	(54.2)
Investing Activities:
Purchases of property, plant and equipment	(0.5)	(1.0)
Net receipts/(payments) on intercompany activity	0.0	0.0
Proceeds from sale of businesses, net of transaction costs	0.0
Proceeds from disposal of property, plant and equipment	0.0	0.0
Other	(0.1)	0.0
Cash provided by (used in) investing activities	(0.6)	(1.0)
Financing Activities:
Borrowings on long-term debt		0.0
Payments on long-term debt and finance leases	(0.2)	(0.1)
Net borrowings under credit facilities	0.0	0.0
Net receipts/(payments) on intercompany activity	74.2	61.6
Sales to noncontrolling interests		0.0
Shares repurchased for income tax withholding on share-based compensation and other	(9.9)	(6.5)
Cash (used in) provided by financing activities	64.1	55.0
Decrease in cash and cash equivalents	7.3	(0.2)
Reportable Legal Entities \| Subsidiary
Statement of Cash Flows
Cash flows provided by (used in) operating activities	(186.9)	(137.9)
Investing Activities:
Purchases of property, plant and equipment	(8.1)	(14.4)
Net receipts/(payments) on intercompany activity	0.0	0.0
Proceeds from sale of businesses, net of transaction costs	0.0
Proceeds from disposal of property, plant and equipment	0.0	0.9
Other	0.0	0.0
Cash provided by (used in) investing activities	(8.1)	(13.5)
Financing Activities:
Borrowings on long-term debt		0.0
Payments on long-term debt and finance leases	0.0	(0.2)
Net borrowings under credit facilities	0.0	0.0
Net receipts/(payments) on intercompany activity	191.9	135.5
Sales to noncontrolling interests		11.7
Shares repurchased for income tax withholding on share-based compensation and other	0.0	0.0
Cash (used in) provided by financing activities	191.9	147.0
Decrease in cash and cash equivalents	(3.1)	(4.4)
Reportable Legal Entities \| NonGuarantor Subsidiaries
Statement of Cash Flows
Cash flows provided by (used in) operating activities	138.7	227.1
Investing Activities:
Purchases of property, plant and equipment	(42.7)	(55.2)
Net receipts/(payments) on intercompany activity	(266.1)	(197.1)
Proceeds from sale of businesses, net of transaction costs	33.4
Proceeds from disposal of property, plant and equipment	29.4	0.1
Other	0.0	(0.2)
Cash provided by (used in) investing activities	(246.0)	(252.4)
Financing Activities:
Borrowings on long-term debt		7.1
Payments on long-term debt and finance leases	(3.1)	(2.5)
Net borrowings under credit facilities	5.4	3.4
Net receipts/(payments) on intercompany activity	0.0	0.0
Sales to noncontrolling interests		2.7
Shares repurchased for income tax withholding on share-based compensation and other	0.0	0.0
Cash (used in) provided by financing activities	2.3	10.7
Decrease in cash and cash equivalents	(105.0)	(14.6)
Eliminations
Statement of Cash Flows
Cash flows provided by (used in) operating activities	0.0	0.0
Investing Activities:
Purchases of property, plant and equipment	0.0	0.0
Net receipts/(payments) on intercompany activity	266.1	197.1
Proceeds from sale of businesses, net of transaction costs	0.0
Proceeds from disposal of property, plant and equipment	0.0	0.0
Other	0.0	0.0
Cash provided by (used in) investing activities	266.1	197.1
Financing Activities:
Borrowings on long-term debt		0.0
Payments on long-term debt and finance leases	0.0	0.0
Net borrowings under credit facilities	0.0	0.0
Net receipts/(payments) on intercompany activity	(266.1)	(197.1)
Sales to noncontrolling interests		0.0
Shares repurchased for income tax withholding on share-based compensation and other	0.0	0.0
Cash (used in) provided by financing activities	(266.1)	(197.1)
Decrease in cash and cash equivalents	$ 0.0	$ 0.0

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