Supplemental Guarantor Information (Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net cash provided by operating activities	$ (104.1)	$ 37.1	$ 28.7
Payments for acquisitions, net of cash acquired	(5.9)	(5.6)	(884.6)
Proceeds from maturities of investments	317.8	296.2	225.0
Proceeds from sale of investments	0.0	0.0
Payments for purchases of investments	(200.2)	(329.8)	(243.5)
Proceeds from divestitures and the sale of assets	11.1	20.9	31.3
Capital expenditures	(58.5)	(69.4)	(39.5)
Increase (decrease) in certain other assets	(29.9)	(33.1)	(28.2)
Proceeds from sale of foreign currency option and forward contracts, net	0.0	0.0	(16.2)
Capital contributions and loans paid	0.0	0.0	0.0
Proceeds from intercompany loans	0.0	0.0	0.0
Net cash provided (used) by investing activities - continuing operations	34.4	(120.8)	(923.3)
Net cash provided by investing activities - discontinued operations	0.0	0.0	361.9
Net cash provided (used) by investing activities	34.4	(120.8)	(561.4)
Dividends paid	(7.7)	(30.6)	(64.6)
Debt issuance costs	(39.4)	(1.1)	(39.2)
Revolving debt borrowings (repayments), net	50.0	75.0	(178.0)
Other debt borrowings	725.9	374.1	1,837.7
Other debt repayments	(337.7)	(458.8)	(662.5)
Distributions to noncontrolling interest holders	(377.2)	(17.6)	(10.2)
Issuance of common shares	0.0	0.3	0.3
Repurchase of common shares	(3.0)	(5.0)	(2.2)
Capital contributions received and loans incurred	0.0	0.0	0.0
Payments on intercompany loans	0.0	0.0	0.0
Net cash provided (used) by financing activities	10.9	(63.7)	881.3
Effect of exchange rate changes on cash	(18.7)	37.9	(8.0)
(Decrease) increase in cash, cash equivalents and restricted cash	(77.5)	(109.5)	340.6
Add: Cash overdraft included in assets held for sale at beginning of year	0.0	0.0	(1.5)
Less: Cash overdraft included in assets held for sale at end of year	7.3	0.0	0.0
Cash, cash equivalents and restricted cash at the beginning of the year	543.2	652.7	313.6
Cash, cash equivalents and restricted cash at the end of the year	458.4	543.2	652.7
Reportable Legal Entities [Member] | Parent Company [Member]
Net cash provided by operating activities	(67.8)	(43.9)	(146.4)
Payments for acquisitions, net of cash acquired	0.0	0.0	(995.2)
Proceeds from maturities of investments	71.2	0.0	(1.9)
Payments for purchases of investments	0.0	(14.0)	0.0
Proceeds from divestitures and the sale of assets	6.7	4.6	0.0
Capital expenditures	(6.5)	(13.0)	(9.2)
Increase (decrease) in certain other assets	(5.8)	(43.0)	0.5
Proceeds from sale of foreign currency option and forward contracts, net			16.2
Capital contributions and loans paid	(503.2)	(114.5)	(270.2)
Proceeds from intercompany loans	29.2	210.7	106.4
Net cash provided (used) by investing activities - continuing operations			(1,153.4)
Net cash provided by investing activities - discontinued operations			361.9
Net cash provided (used) by investing activities	(408.4)	30.8	(791.5)
Dividends paid	(7.7)	(30.6)	(64.6)
Debt issuance costs	(39.4)	(1.1)	(39.2)
Revolving debt borrowings (repayments), net	110.0	0.0	(178.0)
Other debt borrowings	660.0	323.3	1,781.3
Other debt repayments	(284.9)	(354.2)	(439.6)
Distributions to noncontrolling interest holders	0.0	0.0	0.0
Issuance of common shares		0.3	0.3
Repurchase of common shares	(3.0)	(5.0)	(2.2)
Capital contributions received and loans incurred	0.0	0.0	0.0
Payments on intercompany loans	0.0	0.0	0.0
Net cash provided (used) by financing activities	435.0	(67.3)	1,058.0
Effect of exchange rate changes on cash	0.0	0.0	0.0
(Decrease) increase in cash, cash equivalents and restricted cash	(41.2)	(80.4)	120.1
Add: Cash overdraft included in assets held for sale at beginning of year			(1.5)
Less: Cash overdraft included in assets held for sale at end of year	0.0
Cash, cash equivalents and restricted cash at the beginning of the year	58.5	138.9	20.3
Cash, cash equivalents and restricted cash at the end of the year	17.3	58.5	138.9
Reportable Legal Entities [Member] | Guarantor Subsidiaries [Member]
Net cash provided by operating activities	(37.7)	(41.6)	(43.2)
Payments for acquisitions, net of cash acquired	0.0	0.0	0.0
Proceeds from maturities of investments	0.0	0.0	0.0
Payments for purchases of investments	0.0	0.0	0.0
Proceeds from divestitures and the sale of assets	0.0	0.0	0.0
Capital expenditures	(0.1)	(0.1)	(1.0)
Increase (decrease) in certain other assets	0.0	11.8	(6.8)
Proceeds from sale of foreign currency option and forward contracts, net			0.0
Capital contributions and loans paid	0.0	0.0	0.0
Proceeds from intercompany loans	0.0	0.0	0.0
Net cash provided (used) by investing activities - continuing operations			(7.8)
Net cash provided by investing activities - discontinued operations			0.0
Net cash provided (used) by investing activities	(0.1)	11.7	(7.8)
Dividends paid	0.0	0.0	0.0
Debt issuance costs	0.0	0.0	0.0
Revolving debt borrowings (repayments), net	0.0	0.0	0.0
Other debt borrowings	0.0	0.0	0.0
Other debt repayments	(0.3)	(1.2)	(1.2)
Distributions to noncontrolling interest holders	0.0	0.0	0.0
Issuance of common shares		0.0	0.0
Repurchase of common shares	0.0	0.0	0.0
Capital contributions received and loans incurred	59.0	67.1	133.3
Payments on intercompany loans	(20.5)	(36.0)	(86.7)
Net cash provided (used) by financing activities	38.2	29.9	45.4
Effect of exchange rate changes on cash	0.0	0.0	0.0
(Decrease) increase in cash, cash equivalents and restricted cash	0.4	0.0	(5.6)
Add: Cash overdraft included in assets held for sale at beginning of year			0.0
Less: Cash overdraft included in assets held for sale at end of year	0.0
Cash, cash equivalents and restricted cash at the beginning of the year	2.3	2.3	7.9
Cash, cash equivalents and restricted cash at the end of the year	2.7	2.3	2.3
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]
Net cash provided by operating activities	1.4	122.6	232.1
Payments for acquisitions, net of cash acquired	(5.9)	(5.6)	110.6
Proceeds from maturities of investments	246.6	296.2	226.9
Payments for purchases of investments	(200.2)	(315.8)	(243.5)
Proceeds from divestitures and the sale of assets	4.4	16.3	31.3
Capital expenditures	(51.9)	(56.3)	(29.3)
Increase (decrease) in certain other assets	(24.1)	(1.9)	(21.9)
Proceeds from sale of foreign currency option and forward contracts, net			0.0
Capital contributions and loans paid	0.0	0.0	(1,119.3)
Proceeds from intercompany loans	0.0	0.0	0.0
Net cash provided (used) by investing activities - continuing operations			(1,045.2)
Net cash provided by investing activities - discontinued operations			0.0
Net cash provided (used) by investing activities	(31.1)	(67.1)	(1,045.2)
Dividends paid	0.0	0.0	(13.8)
Debt issuance costs	0.0	0.0	0.0
Revolving debt borrowings (repayments), net	(60.0)	75.0	0.0
Other debt borrowings	65.9	50.8	56.4
Other debt repayments	(52.5)	(103.4)	(221.7)
Distributions to noncontrolling interest holders	(377.2)	(17.6)	(10.2)
Issuance of common shares		0.0	0.0
Repurchase of common shares	0.0	0.0	0.0
Capital contributions received and loans incurred	444.2	47.4	1,256.2
Payments on intercompany loans	(8.7)	(174.7)	(19.7)
Net cash provided (used) by financing activities	11.7	(122.5)	1,047.2
Effect of exchange rate changes on cash	(18.7)	37.9	(8.0)
(Decrease) increase in cash, cash equivalents and restricted cash	(36.7)	(29.1)	226.1
Add: Cash overdraft included in assets held for sale at beginning of year			0.0
Less: Cash overdraft included in assets held for sale at end of year	7.3
Cash, cash equivalents and restricted cash at the beginning of the year	482.4	511.5	285.4
Cash, cash equivalents and restricted cash at the end of the year	438.4	482.4	511.5
Consolidation, Eliminations [Member]
Net cash provided by operating activities	0.0	0.0	(13.8)
Payments for acquisitions, net of cash acquired	0.0	0.0	0.0
Proceeds from maturities of investments	0.0	0.0	0.0
Payments for purchases of investments	0.0	0.0	0.0
Proceeds from divestitures and the sale of assets	0.0	0.0	0.0
Capital expenditures	0.0	0.0	0.0
Increase (decrease) in certain other assets	0.0	0.0	0.0
Proceeds from sale of foreign currency option and forward contracts, net			0.0
Capital contributions and loans paid	503.2	114.5	1,389.5
Proceeds from intercompany loans	(29.2)	(210.7)	(106.4)
Net cash provided (used) by investing activities - continuing operations			1,283.1
Net cash provided by investing activities - discontinued operations			0.0
Net cash provided (used) by investing activities	474.0	(96.2)	1,283.1
Dividends paid	0.0	0.0	13.8
Debt issuance costs	0.0	0.0	0.0
Revolving debt borrowings (repayments), net	0.0	0.0	0.0
Other debt borrowings	0.0	0.0	0.0
Other debt repayments	0.0	0.0	0.0
Distributions to noncontrolling interest holders	0.0	0.0	0.0
Issuance of common shares		0.0	0.0
Repurchase of common shares	0.0	0.0	0.0
Capital contributions received and loans incurred	(503.2)	(114.5)	(1,389.5)
Payments on intercompany loans	29.2	210.7	106.4
Net cash provided (used) by financing activities	(474.0)	96.2	(1,269.3)
Effect of exchange rate changes on cash	0.0	0.0	0.0
(Decrease) increase in cash, cash equivalents and restricted cash	0.0	0.0	0.0
Add: Cash overdraft included in assets held for sale at beginning of year			0.0
Less: Cash overdraft included in assets held for sale at end of year	0.0
Cash, cash equivalents and restricted cash at the beginning of the year	0.0	0.0	0.0
Cash, cash equivalents and restricted cash at the end of the year	$ 0.0	$ 0.0	$ 0.0