SUPPLEMENTARY GUARANTOR INFORMATION (Supplementary Statements of Condensed Consolidating Cash Flows) (Details) - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Net cash provided (used) by operating activities |
$ 478.5
|
$ 338.1
|
$ 303.0
|
| INVESTING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
| Purchase of property, plant and equipment |
(208.6)
|
(134.9)
|
(61.7)
|
| Deposits for property, plant and equipment |
(87.5)
|
(16.8)
|
(7.4)
|
| Intercompany investing |
0.0
|
0.0
|
0.0
|
| Other investing activities |
23.0
|
(4.3)
|
11.2
|
| Net cash used by investing activities |
(273.1)
|
(156.0)
|
(57.9)
|
| Payments for Repurchase of Common Stock |
(47.5)
|
Ìý
|
Ìý
|
| FINANCING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
| Net proceeds from issuance of common shares |
0.0
|
661.3
|
287.4
|
| Proceeds from issuance of debt |
0.0
|
1,771.5
|
0.0
|
| Debt issuance costs |
(1.5)
|
(28.6)
|
(5.2)
|
| Borrowings under credit facilities |
0.0
|
0.0
|
105.0
|
| Repayment under credit facilities |
0.0
|
0.0
|
(105.0)
|
| Repayments on equipment loans |
0.0
|
0.0
|
(95.6)
|
| Repurchase of debt |
(234.5)
|
(1,720.7)
|
(305.4)
|
| Acquisition of noncontrolling interest |
0.0
|
(105.0)
|
0.0
|
| Distributions of partnership equity |
(44.2)
|
(52.9)
|
(59.9)
|
| Intercompany financing |
0.0
|
0.0
|
0.0
|
| Other financing activities |
(47.5)
|
(26.7)
|
(27.7)
|
| Net cash provided (used) by financing activities |
(375.2)
|
498.9
|
(206.4)
|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH |
(2.3)
|
3.3
|
(0.5)
|
| Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations |
(172.1)
|
684.3
|
38.2
|
| LESS: INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS CLASSIFIED WITHIN CURRENT ASSETS OF DISCONTINUED OPERATIONS |
(17.0)
|
18.8
|
(35.3)
|
| NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |
(155.1)
|
665.5
|
73.5
|
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR |
978.3
|
312.8
|
239.3
|
| CASH AND CASH EQUIVALENTS AT END OF YEAR |
823.2
|
978.3
|
312.8
|
| Consolidation, Eliminations [Member] |
Ìý
|
Ìý
|
Ìý
|
| Net cash provided (used) by operating activities |
0.0
|
0.0
|
0.0
|
| INVESTING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
| Purchase of property, plant and equipment |
0.0
|
0.0
|
0.0
|
| Deposits for property, plant and equipment |
0.0
|
0.0
|
0.0
|
| Intercompany investing |
(512.7)
|
(173.3)
|
(236.3)
|
| Other investing activities |
0.0
|
0.0
|
0.0
|
| Net cash used by investing activities |
(512.7)
|
(173.3)
|
(236.3)
|
| Payments for Repurchase of Common Stock |
0.0
|
Ìý
|
Ìý
|
| FINANCING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
| Net proceeds from issuance of common shares |
Ìý
|
0.0
|
0.0
|
| Proceeds from issuance of debt |
Ìý
|
0.0
|
Ìý
|
| Debt issuance costs |
0.0
|
0.0
|
0.0
|
| Borrowings under credit facilities |
Ìý
|
Ìý
|
0.0
|
| Repayment under credit facilities |
Ìý
|
Ìý
|
0.0
|
| Repayments on equipment loans |
Ìý
|
Ìý
|
0.0
|
| Repurchase of debt |
0.0
|
0.0
|
0.0
|
| Acquisition of noncontrolling interest |
Ìý
|
0.0
|
Ìý
|
| Distributions of partnership equity |
0.0
|
0.0
|
0.0
|
| Intercompany financing |
512.7
|
173.3
|
236.3
|
| Other financing activities |
0.0
|
0.0
|
0.0
|
| Net cash provided (used) by financing activities |
512.7
|
173.3
|
236.3
|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH |
0.0
|
0.0
|
0.0
|
| Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations |
0.0
|
0.0
|
0.0
|
| LESS: INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS CLASSIFIED WITHIN CURRENT ASSETS OF DISCONTINUED OPERATIONS |
0.0
|
0.0
|
0.0
|
| NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |
0.0
|
0.0
|
0.0
|
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR |
0.0
|
0.0
|
0.0
|
| CASH AND CASH EQUIVALENTS AT END OF YEAR |
0.0
|
0.0
|
0.0
|
| Parent [Member] | Reportable Legal Entities [Member] |
Ìý
|
Ìý
|
Ìý
|
| Net cash provided (used) by operating activities |
(120.7)
|
(166.8)
|
(275.7)
|
| INVESTING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
| Purchase of property, plant and equipment |
(1.2)
|
(3.4)
|
(6.2)
|
| Deposits for property, plant and equipment |
0.0
|
0.0
|
0.0
|
| Intercompany investing |
399.1
|
225.7
|
356.6
|
| Other investing activities |
0.0
|
(7.7)
|
0.4
|
| Net cash used by investing activities |
397.9
|
214.6
|
350.8
|
| Payments for Repurchase of Common Stock |
(47.5)
|
Ìý
|
Ìý
|
| FINANCING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
| Net proceeds from issuance of common shares |
Ìý
|
661.3
|
287.4
|
| Proceeds from issuance of debt |
Ìý
|
1,771.5
|
Ìý
|
| Debt issuance costs |
(1.5)
|
(28.6)
|
(5.2)
|
| Borrowings under credit facilities |
Ìý
|
Ìý
|
105.0
|
| Repayment under credit facilities |
Ìý
|
Ìý
|
(105.0)
|
| Repayments on equipment loans |
Ìý
|
Ìý
|
(95.6)
|
| Repurchase of debt |
(234.5)
|
(1,720.7)
|
(305.4)
|
| Acquisition of noncontrolling interest |
Ìý
|
(105.0)
|
Ìý
|
| Distributions of partnership equity |
0.0
|
0.0
|
0.0
|
| Intercompany financing |
(120.7)
|
45.0
|
117.0
|
| Other financing activities |
(2.1)
|
(5.8)
|
(0.6)
|
| Net cash provided (used) by financing activities |
(406.3)
|
617.7
|
(2.4)
|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH |
0.0
|
0.0
|
0.0
|
| Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations |
(129.1)
|
665.5
|
72.7
|
| LESS: INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS CLASSIFIED WITHIN CURRENT ASSETS OF DISCONTINUED OPERATIONS |
0.0
|
0.0
|
0.0
|
| NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |
(129.1)
|
665.5
|
72.7
|
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR |
948.9
|
283.4
|
210.7
|
| CASH AND CASH EQUIVALENTS AT END OF YEAR |
819.8
|
948.9
|
283.4
|
| Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |
Ìý
|
Ìý
|
Ìý
|
| Net cash provided (used) by operating activities |
741.0
|
430.0
|
462.9
|
| INVESTING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
| Purchase of property, plant and equipment |
(207.3)
|
(79.8)
|
(55.1)
|
| Deposits for property, plant and equipment |
(82.3)
|
(11.7)
|
(4.9)
|
| Intercompany investing |
(7.1)
|
(7.3)
|
(3.3)
|
| Other investing activities |
3.1
|
3.4
|
10.8
|
| Net cash used by investing activities |
(293.6)
|
(95.4)
|
(52.5)
|
| Payments for Repurchase of Common Stock |
0.0
|
Ìý
|
Ìý
|
| FINANCING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
| Net proceeds from issuance of common shares |
Ìý
|
0.0
|
0.0
|
| Proceeds from issuance of debt |
Ìý
|
0.0
|
Ìý
|
| Debt issuance costs |
0.0
|
0.0
|
0.0
|
| Borrowings under credit facilities |
Ìý
|
Ìý
|
0.0
|
| Repayment under credit facilities |
Ìý
|
Ìý
|
0.0
|
| Repayments on equipment loans |
Ìý
|
Ìý
|
0.0
|
| Repurchase of debt |
0.0
|
0.0
|
0.0
|
| Acquisition of noncontrolling interest |
Ìý
|
0.0
|
Ìý
|
| Distributions of partnership equity |
(44.2)
|
(52.9)
|
(59.9)
|
| Intercompany financing |
(402.4)
|
(277.6)
|
(339.9)
|
| Other financing activities |
(2.2)
|
(4.5)
|
(9.9)
|
| Net cash provided (used) by financing activities |
(448.8)
|
(335.0)
|
(409.7)
|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH |
0.0
|
0.0
|
0.0
|
| Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations |
(1.4)
|
(0.4)
|
0.7
|
| LESS: INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS CLASSIFIED WITHIN CURRENT ASSETS OF DISCONTINUED OPERATIONS |
0.0
|
0.0
|
0.0
|
| NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |
(1.4)
|
(0.4)
|
0.7
|
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR |
2.1
|
2.5
|
1.8
|
| CASH AND CASH EQUIVALENTS AT END OF YEAR |
0.7
|
2.1
|
2.5
|
| Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |
Ìý
|
Ìý
|
Ìý
|
| Net cash provided (used) by operating activities |
(141.8)
|
74.9
|
115.8
|
| INVESTING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
| Purchase of property, plant and equipment |
(0.1)
|
(51.7)
|
(0.4)
|
| Deposits for property, plant and equipment |
(5.2)
|
(5.1)
|
(2.5)
|
| Intercompany investing |
120.7
|
(45.1)
|
(117.0)
|
| Other investing activities |
19.9
|
0.0
|
0.0
|
| Net cash used by investing activities |
135.3
|
(101.9)
|
(119.9)
|
| Payments for Repurchase of Common Stock |
0.0
|
Ìý
|
Ìý
|
| FINANCING ACTIVITIES |
Ìý
|
Ìý
|
Ìý
|
| Net proceeds from issuance of common shares |
Ìý
|
0.0
|
0.0
|
| Proceeds from issuance of debt |
Ìý
|
0.0
|
Ìý
|
| Debt issuance costs |
0.0
|
0.0
|
0.0
|
| Borrowings under credit facilities |
Ìý
|
Ìý
|
0.0
|
| Repayment under credit facilities |
Ìý
|
Ìý
|
0.0
|
| Repayments on equipment loans |
Ìý
|
Ìý
|
0.0
|
| Repurchase of debt |
0.0
|
0.0
|
0.0
|
| Acquisition of noncontrolling interest |
Ìý
|
0.0
|
Ìý
|
| Distributions of partnership equity |
0.0
|
0.0
|
0.0
|
| Intercompany financing |
10.4
|
59.3
|
(13.4)
|
| Other financing activities |
(43.2)
|
(16.4)
|
(17.2)
|
| Net cash provided (used) by financing activities |
(32.8)
|
42.9
|
(30.6)
|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH |
(2.3)
|
3.3
|
(0.5)
|
| Increase (Decrease) in Cash and Cash Equivalents, Including Cash Classified Within Current Assets of Discontinued Operations |
(41.6)
|
19.2
|
(35.2)
|
| LESS: INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS CLASSIFIED WITHIN CURRENT ASSETS OF DISCONTINUED OPERATIONS |
(17.0)
|
18.8
|
(35.3)
|
| NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |
(24.6)
|
0.4
|
0.1
|
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR |
27.3
|
26.9
|
26.8
|
| CASH AND CASH EQUIVALENTS AT END OF YEAR |
$ 2.7
|
$ 27.3
|
$ 26.9
|