Supplemental Guarantor Information Supplemental Guarantor Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net cash used by operating activities	$ (57.1)	$ (142.3)
Cash flow from investing activities:
Capital expenditures	(14.7)	(20.2)
Payments for acquisitions	0.0	(5.8)
Proceeds from maturities of short-term investments	52.7	104.6
Payments for purchases of short-term investments	(48.3)	(45.5)
Proceeds from sale of assets	4.2	9.2
Increase in certain other assets	(5.4)	(9.1)
Capital contributions and loans paid	0.0	0.0
Proceeds from intercompany loans	0.0	0.0
Net cash used by investing activities	(11.5)	33.2
Cash flow from financing activities:
Dividends paid	0.0	(7.7)
Revolving credit facility borrowings (repayments), net	10.0	(75.0)
Other debt borrowings	5.0	26.0
Other debt repayments	(16.8)	(31.7)
Distributions and payments to noncontrolling interest holders	(11.0)	(0.5)
Repurchase of common shares	(1.1)	(2.5)
Capital contributions received and loans incurred	0.0	0.0
Payments on intercompany loans	0.0	0.0
Net cash provided by financing activities	(13.9)	(91.4)
Effect of exchange rate changes on cash and cash equivalents	(0.5)	21.5
Increase (decrease) in cash, cash equivalents and restricted cash	(83.0)	(179.0)
Add: Cash included in assets held for sale at beginning of period	7.3	0.0
Less: Cash included in assets held for sale at end of period	4.8	0.0
Cash, cash equivalents and restricted cash at the beginning of the period	458.4	543.2
Cash, cash equivalents and restricted cash at the end of the period	377.9	364.2
Reportable Legal Entities [Member] | Parent Company [Member]
Net cash used by operating activities	15.3	(31.8)
Cash flow from investing activities:
Capital expenditures	(1.1)	(2.3)
Payments for acquisitions		0.0
Proceeds from maturities of short-term investments	2.0	1.0
Payments for purchases of short-term investments	0.0	0.0
Proceeds from sale of assets	0.0	8.6
Increase in certain other assets	(1.6)	(2.5)
Capital contributions and loans paid	(16.5)	(12.1)
Proceeds from intercompany loans	6.4	9.3
Net cash used by investing activities	(10.8)	2.0
Cash flow from financing activities:
Dividends paid		(7.7)
Revolving credit facility borrowings (repayments), net	0.0	0.0
Other debt borrowings	0.0	0.0
Other debt repayments	(6.6)	(11.3)
Distributions and payments to noncontrolling interest holders	0.0	0.0
Repurchase of common shares	(1.1)	(2.5)
Capital contributions received and loans incurred	0.0	0.0
Payments on intercompany loans	0.0	0.0
Net cash provided by financing activities	(7.7)	(21.5)
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Increase (decrease) in cash, cash equivalents and restricted cash	(3.2)	(51.3)
Add: Cash included in assets held for sale at beginning of period	0.0
Less: Cash included in assets held for sale at end of period	0.0
Cash, cash equivalents and restricted cash at the beginning of the period	17.3	58.5
Cash, cash equivalents and restricted cash at the end of the period	14.1	7.2
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Net cash used by operating activities	(12.5)	(3.0)
Cash flow from investing activities:
Capital expenditures	0.0	(0.1)
Payments for acquisitions		0.0
Proceeds from maturities of short-term investments	0.0	0.0
Payments for purchases of short-term investments	0.0	0.0
Proceeds from sale of assets	0.0	0.0
Increase in certain other assets	0.0	0.8
Capital contributions and loans paid	0.0	0.0
Proceeds from intercompany loans	0.0	0.0
Net cash used by investing activities	0.0	0.7
Cash flow from financing activities:
Dividends paid		0.0
Revolving credit facility borrowings (repayments), net	0.0	0.0
Other debt borrowings	0.0	0.0
Other debt repayments	0.0	(0.1)
Distributions and payments to noncontrolling interest holders	0.0	0.0
Repurchase of common shares	0.0	0.0
Capital contributions received and loans incurred	16.1	12.1
Payments on intercompany loans	(3.3)	(9.3)
Net cash provided by financing activities	12.8	2.7
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Increase (decrease) in cash, cash equivalents and restricted cash	0.3	0.4
Add: Cash included in assets held for sale at beginning of period	0.0
Less: Cash included in assets held for sale at end of period	0.0
Cash, cash equivalents and restricted cash at the beginning of the period	2.7	2.3
Cash, cash equivalents and restricted cash at the end of the period	3.0	2.7
Reportable Legal Entities [Member] | Foreign Guarantor Subsidiary [Member]
Net cash used by operating activities	0.0	(0.2)
Cash flow from investing activities:
Capital expenditures	0.0	0.0
Payments for acquisitions		0.0
Proceeds from maturities of short-term investments	0.0	0.0
Payments for purchases of short-term investments	0.0	0.0
Proceeds from sale of assets	0.0	0.0
Increase in certain other assets	0.0	0.0
Capital contributions and loans paid	0.0	0.0
Proceeds from intercompany loans	0.0	0.0
Net cash used by investing activities	0.0	0.0
Cash flow from financing activities:
Dividends paid		0.0
Revolving credit facility borrowings (repayments), net	0.0	0.0
Other debt borrowings	0.0	0.0
Other debt repayments	0.0	0.0
Distributions and payments to noncontrolling interest holders	0.0	0.0
Repurchase of common shares	0.0	0.0
Capital contributions received and loans incurred	0.0	0.0
Payments on intercompany loans	0.0	0.0
Net cash provided by financing activities	0.0	0.0
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Increase (decrease) in cash, cash equivalents and restricted cash	0.0	(0.2)
Add: Cash included in assets held for sale at beginning of period	0.0
Less: Cash included in assets held for sale at end of period	0.0
Cash, cash equivalents and restricted cash at the beginning of the period	0.0	0.2
Cash, cash equivalents and restricted cash at the end of the period	0.0	0.0
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Net cash used by operating activities	(59.9)	(107.3)
Cash flow from investing activities:
Capital expenditures	(13.6)	(17.8)
Payments for acquisitions		(5.8)
Proceeds from maturities of short-term investments	50.7	103.6
Payments for purchases of short-term investments	(48.3)	(45.5)
Proceeds from sale of assets	4.2	0.6
Increase in certain other assets	(3.8)	(7.4)
Capital contributions and loans paid	0.0	0.0
Proceeds from intercompany loans	0.0	0.0
Net cash used by investing activities	(10.8)	27.7
Cash flow from financing activities:
Dividends paid		0.0
Revolving credit facility borrowings (repayments), net	10.0	(75.0)
Other debt borrowings	5.0	26.0
Other debt repayments	(10.2)	(20.3)
Distributions and payments to noncontrolling interest holders	(11.0)	(0.5)
Repurchase of common shares	0.0	0.0
Capital contributions received and loans incurred	0.4	0.0
Payments on intercompany loans	(3.1)	0.0
Net cash provided by financing activities	(8.9)	(69.8)
Effect of exchange rate changes on cash and cash equivalents	(0.5)	21.5
Increase (decrease) in cash, cash equivalents and restricted cash	(80.1)	(127.9)
Add: Cash included in assets held for sale at beginning of period	7.3
Less: Cash included in assets held for sale at end of period	4.8
Cash, cash equivalents and restricted cash at the beginning of the period	438.4	482.2
Cash, cash equivalents and restricted cash at the end of the period	360.8	354.3
Consolidation, Eliminations [Member]
Net cash used by operating activities	0.0	0.0
Cash flow from investing activities:
Capital expenditures	0.0	0.0
Payments for acquisitions		0.0
Proceeds from maturities of short-term investments	0.0	0.0
Payments for purchases of short-term investments	0.0	0.0
Proceeds from sale of assets	0.0	0.0
Increase in certain other assets	0.0	0.0
Capital contributions and loans paid	16.5	12.1
Proceeds from intercompany loans	(6.4)	(9.3)
Net cash used by investing activities	10.1	2.8
Cash flow from financing activities:
Dividends paid		0.0
Revolving credit facility borrowings (repayments), net	0.0	0.0
Other debt borrowings	0.0	0.0
Other debt repayments	0.0	0.0
Distributions and payments to noncontrolling interest holders	0.0	0.0
Repurchase of common shares	0.0	0.0
Capital contributions received and loans incurred	(16.5)	(12.1)
Payments on intercompany loans	6.4	9.3
Net cash provided by financing activities	(10.1)	(2.8)
Effect of exchange rate changes on cash and cash equivalents	0.0	0.0
Increase (decrease) in cash, cash equivalents and restricted cash	0.0	0.0
Add: Cash included in assets held for sale at beginning of period	0.0
Less: Cash included in assets held for sale at end of period	0.0
Cash, cash equivalents and restricted cash at the beginning of the period	0.0	0.0
Cash, cash equivalents and restricted cash at the end of the period	$ 0.0	$ 0.0