SUPPLEMENTARY GUARANTOR INFORMATION (Supplementary Statements of Condensed Consolidating Cash Flows) (Details) - USD ($)
$ in Millions |
12 Months Ended |
|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Net cash provided (used) by operating activities |
$ 562.5
|
$ 478.5
|
$ 338.1
|
Ìý
|
| INVESTING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Purchase of property, plant and equipment |
(639.0)
|
(208.6)
|
(134.9)
|
Ìý
|
| Deposits for property, plant and equipment |
17.0
|
87.5
|
16.8
|
Ìý
|
| Intercompany investing |
0.0
|
0.0
|
0.0
|
Ìý
|
| Other investing activities |
11.6
|
23.0
|
(4.3)
|
Ìý
|
| Net cash provided (used) by investing activities |
(644.4)
|
(273.1)
|
(156.0)
|
Ìý
|
| FINANCING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Repurchase of common shares |
(252.9)
|
(47.5)
|
0.0
|
Ìý
|
| Dividends paid |
(72.1)
|
0.0
|
0.0
|
Ìý
|
| Net proceeds from issuance of common shares |
0.0
|
0.0
|
661.3
|
Ìý
|
| Proceeds from issuance of debt |
720.9
|
0.0
|
1,771.5
|
Ìý
|
| Debt issuance costs |
(6.8)
|
(1.5)
|
(28.6)
|
Ìý
|
| Repurchase of debt |
(729.3)
|
(234.5)
|
(1,720.7)
|
Ìý
|
| Acquisition of noncontrolling interest |
0.0
|
0.0
|
(105.0)
|
Ìý
|
| Distributions of partnership equity |
(44.2)
|
(44.2)
|
(52.9)
|
Ìý
|
| Intercompany financing |
0.0
|
0.0
|
0.0
|
Ìý
|
| Other financing activities |
(9.7)
|
(47.5)
|
(26.7)
|
Ìý
|
| Net cash provided (used) by financing activities |
(394.1)
|
(375.2)
|
498.9
|
Ìý
|
| Effect of exchange rate changes on cash |
0.0
|
(2.3)
|
3.3
|
Ìý
|
| Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations |
(476.0)
|
(172.1)
|
684.3
|
Ìý
|
| Less: increase (decrease) in cash and cash equivalents from discontinued operations, classified within other current assets |
(5.4)
|
(17.0)
|
18.8
|
Ìý
|
| Net increase (decrease) in cash and cash equivalents |
(470.6)
|
(155.1)
|
665.5
|
Ìý
|
| Cash and cash equivalents |
352.6
|
823.2
|
978.3
|
$ 312.8
|
| Consolidation, Eliminations [Member] |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Net cash provided (used) by operating activities |
0.0
|
0.0
|
0.0
|
Ìý
|
| INVESTING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Purchase of property, plant and equipment |
0.0
|
0.0
|
0.0
|
Ìý
|
| Deposits for property, plant and equipment |
0.0
|
0.0
|
0.0
|
Ìý
|
| Intercompany investing |
67.7
|
(512.7)
|
(173.3)
|
Ìý
|
| Other investing activities |
0.0
|
0.0
|
0.0
|
Ìý
|
| Net cash provided (used) by investing activities |
67.7
|
(512.7)
|
(173.3)
|
Ìý
|
| FINANCING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Repurchase of common shares |
0.0
|
0.0
|
Ìý
|
Ìý
|
| Dividends paid |
0.0
|
Ìý
|
Ìý
|
Ìý
|
| Net proceeds from issuance of common shares |
Ìý
|
Ìý
|
0.0
|
Ìý
|
| Proceeds from issuance of debt |
0.0
|
Ìý
|
0.0
|
Ìý
|
| Debt issuance costs |
0.0
|
0.0
|
0.0
|
Ìý
|
| Repurchase of debt |
0.0
|
0.0
|
0.0
|
Ìý
|
| Acquisition of noncontrolling interest |
Ìý
|
Ìý
|
0.0
|
Ìý
|
| Distributions of partnership equity |
0.0
|
0.0
|
0.0
|
Ìý
|
| Intercompany financing |
(67.7)
|
512.7
|
173.3
|
Ìý
|
| Other financing activities |
0.0
|
0.0
|
0.0
|
Ìý
|
| Net cash provided (used) by financing activities |
(67.7)
|
512.7
|
173.3
|
Ìý
|
| Effect of exchange rate changes on cash |
0.0
|
0.0
|
0.0
|
Ìý
|
| Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations |
0.0
|
0.0
|
0.0
|
Ìý
|
| Less: increase (decrease) in cash and cash equivalents from discontinued operations, classified within other current assets |
0.0
|
0.0
|
0.0
|
Ìý
|
| Net increase (decrease) in cash and cash equivalents |
0.0
|
0.0
|
0.0
|
Ìý
|
| Cash and cash equivalents |
0.0
|
0.0
|
0.0
|
0.0
|
| Parent [Member] | Reportable Legal Entities [Member] |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Net cash provided (used) by operating activities |
(50.0)
|
(120.7)
|
(166.8)
|
Ìý
|
| INVESTING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Purchase of property, plant and equipment |
(1.2)
|
(1.2)
|
(3.4)
|
Ìý
|
| Deposits for property, plant and equipment |
0.0
|
0.0
|
0.0
|
Ìý
|
| Intercompany investing |
(63.9)
|
399.1
|
225.7
|
Ìý
|
| Other investing activities |
0.0
|
0.0
|
(7.7)
|
Ìý
|
| Net cash provided (used) by investing activities |
(65.1)
|
397.9
|
214.6
|
Ìý
|
| FINANCING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Repurchase of common shares |
(252.9)
|
(47.5)
|
Ìý
|
Ìý
|
| Dividends paid |
(72.1)
|
Ìý
|
Ìý
|
Ìý
|
| Net proceeds from issuance of common shares |
Ìý
|
Ìý
|
661.3
|
Ìý
|
| Proceeds from issuance of debt |
720.9
|
Ìý
|
1,771.5
|
Ìý
|
| Debt issuance costs |
(6.8)
|
(1.5)
|
(28.6)
|
Ìý
|
| Repurchase of debt |
(729.3)
|
(234.5)
|
(1,720.7)
|
Ìý
|
| Acquisition of noncontrolling interest |
Ìý
|
Ìý
|
(105.0)
|
Ìý
|
| Distributions of partnership equity |
0.0
|
0.0
|
0.0
|
Ìý
|
| Intercompany financing |
0.1
|
(120.7)
|
45.0
|
Ìý
|
| Other financing activities |
(14.9)
|
(2.1)
|
(5.8)
|
Ìý
|
| Net cash provided (used) by financing activities |
(355.0)
|
(406.3)
|
617.7
|
Ìý
|
| Effect of exchange rate changes on cash |
0.0
|
0.0
|
0.0
|
Ìý
|
| Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations |
(470.1)
|
(129.1)
|
665.5
|
Ìý
|
| Less: increase (decrease) in cash and cash equivalents from discontinued operations, classified within other current assets |
0.0
|
0.0
|
0.0
|
Ìý
|
| Net increase (decrease) in cash and cash equivalents |
(470.1)
|
(129.1)
|
665.5
|
Ìý
|
| Cash and cash equivalents |
349.7
|
819.8
|
948.9
|
283.4
|
| Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Net cash provided (used) by operating activities |
616.3
|
741.0
|
430.0
|
Ìý
|
| INVESTING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Purchase of property, plant and equipment |
(637.8)
|
(207.3)
|
(79.8)
|
Ìý
|
| Deposits for property, plant and equipment |
14.0
|
82.3
|
11.7
|
Ìý
|
| Intercompany investing |
(3.7)
|
(7.1)
|
(7.3)
|
Ìý
|
| Other investing activities |
10.8
|
3.1
|
3.4
|
Ìý
|
| Net cash provided (used) by investing activities |
(644.7)
|
(293.6)
|
(95.4)
|
Ìý
|
| FINANCING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Repurchase of common shares |
0.0
|
0.0
|
Ìý
|
Ìý
|
| Dividends paid |
0.0
|
Ìý
|
Ìý
|
Ìý
|
| Net proceeds from issuance of common shares |
Ìý
|
Ìý
|
0.0
|
Ìý
|
| Proceeds from issuance of debt |
0.0
|
Ìý
|
0.0
|
Ìý
|
| Debt issuance costs |
0.0
|
0.0
|
0.0
|
Ìý
|
| Repurchase of debt |
0.0
|
0.0
|
0.0
|
Ìý
|
| Acquisition of noncontrolling interest |
Ìý
|
Ìý
|
0.0
|
Ìý
|
| Distributions of partnership equity |
(44.2)
|
(44.2)
|
(52.9)
|
Ìý
|
| Intercompany financing |
63.4
|
(402.4)
|
(277.6)
|
Ìý
|
| Other financing activities |
8.6
|
(2.2)
|
(4.5)
|
Ìý
|
| Net cash provided (used) by financing activities |
27.8
|
(448.8)
|
(335.0)
|
Ìý
|
| Effect of exchange rate changes on cash |
0.0
|
0.0
|
0.0
|
Ìý
|
| Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations |
(0.6)
|
(1.4)
|
(0.4)
|
Ìý
|
| Less: increase (decrease) in cash and cash equivalents from discontinued operations, classified within other current assets |
0.0
|
0.0
|
0.0
|
Ìý
|
| Net increase (decrease) in cash and cash equivalents |
(0.6)
|
(1.4)
|
(0.4)
|
Ìý
|
| Cash and cash equivalents |
0.1
|
0.7
|
2.1
|
2.5
|
| Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Net cash provided (used) by operating activities |
(3.8)
|
(141.8)
|
74.9
|
Ìý
|
| INVESTING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Purchase of property, plant and equipment |
0.0
|
(0.1)
|
(51.7)
|
Ìý
|
| Deposits for property, plant and equipment |
3.0
|
5.2
|
5.1
|
Ìý
|
| Intercompany investing |
(0.1)
|
120.7
|
(45.1)
|
Ìý
|
| Other investing activities |
0.8
|
19.9
|
0.0
|
Ìý
|
| Net cash provided (used) by investing activities |
(2.3)
|
135.3
|
(101.9)
|
Ìý
|
| FINANCING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
Ìý
|
| Repurchase of common shares |
0.0
|
0.0
|
Ìý
|
Ìý
|
| Dividends paid |
0.0
|
Ìý
|
Ìý
|
Ìý
|
| Net proceeds from issuance of common shares |
Ìý
|
Ìý
|
0.0
|
Ìý
|
| Proceeds from issuance of debt |
0.0
|
Ìý
|
0.0
|
Ìý
|
| Debt issuance costs |
0.0
|
0.0
|
0.0
|
Ìý
|
| Repurchase of debt |
0.0
|
0.0
|
0.0
|
Ìý
|
| Acquisition of noncontrolling interest |
Ìý
|
Ìý
|
0.0
|
Ìý
|
| Distributions of partnership equity |
0.0
|
0.0
|
0.0
|
Ìý
|
| Intercompany financing |
4.2
|
10.4
|
59.3
|
Ìý
|
| Other financing activities |
(3.4)
|
(43.2)
|
(16.4)
|
Ìý
|
| Net cash provided (used) by financing activities |
0.8
|
(32.8)
|
42.9
|
Ìý
|
| Effect of exchange rate changes on cash |
0.0
|
(2.3)
|
3.3
|
Ìý
|
| Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations |
(5.3)
|
(41.6)
|
19.2
|
Ìý
|
| Less: increase (decrease) in cash and cash equivalents from discontinued operations, classified within other current assets |
(5.4)
|
(17.0)
|
18.8
|
Ìý
|
| Net increase (decrease) in cash and cash equivalents |
0.1
|
(24.6)
|
0.4
|
Ìý
|
| Cash and cash equivalents |
$ 2.8
|
$ 2.7
|
$ 27.3
|
$ 26.9
|