SUPPLEMENTARY GUARANTOR INFORMATION (Supplementary Statements of Condensed Consolidating Cash Flows) (Details) - USD ($)
$ in Millions |
9 Months Ended |
12 Months Ended |
Sep. 30, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Net cash provided (used) by operating activities |
|
$ 338.1
|
$ 303.0
|
$ 37.9
|
| INVESTING ACTIVITIES |
|
|
|
|
| Purchase of property, plant and equipment |
|
151.7
|
69.1
|
80.8
|
| Intercompany investing |
|
0.0
|
0.0
|
0.0
|
| Other investing activities |
|
(4.3)
|
11.2
|
(22.4)
|
| Net cash provided (used) by investing activities |
|
156.0
|
57.9
|
103.2
|
| FINANCING ACTIVITIES |
|
|
|
|
| Net proceeds from issuance of common shares |
$ 287.6
|
661.3
|
287.4
|
0.0
|
| Proceeds from issuance of debt |
|
1,771.5
|
0.0
|
503.5
|
| Debt issuance costs |
|
(28.6)
|
(5.2)
|
(33.6)
|
| Borrowings under credit facilities |
|
0.0
|
105.0
|
309.8
|
| Repayment under credit facilities |
|
0.0
|
(105.0)
|
(309.8)
|
| Repayments on equipment loans |
|
0.0
|
(95.6)
|
(45.4)
|
| Repurchase of debt |
|
(1,720.7)
|
(305.4)
|
(225.9)
|
| Acquisition of noncontrolling interest |
|
(105.0)
|
0.0
|
0.0
|
| Distributions of partnership equity |
|
(52.9)
|
(59.9)
|
(40.6)
|
| Preferred stock dividends |
|
0.0
|
0.0
|
(51.2)
|
| Intercompany financing |
|
0.0
|
0.0
|
0.0
|
| Other financing activities |
|
(26.7)
|
(27.7)
|
(45.8)
|
| Net cash provided (used) by financing activities |
|
498.9
|
(206.4)
|
61.0
|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH |
|
3.3
|
(0.5)
|
(1.4)
|
| INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |
|
684.3
|
38.2
|
(5.7)
|
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR |
285.2
|
323.4
|
285.2
|
290.9
|
| CASH AND CASH EQUIVALENTS AT END OF YEAR |
|
1,007.7
|
323.4
|
285.2
|
| Consolidation, Eliminations [Member] |
|
|
|
|
| Net cash provided (used) by operating activities |
|
0.0
|
0.0
|
0.0
|
| INVESTING ACTIVITIES |
|
|
|
|
| Purchase of property, plant and equipment |
|
0.0
|
0.0
|
0.0
|
| Intercompany investing |
|
(173.3)
|
(236.3)
|
288.7
|
| Other investing activities |
|
0.0
|
0.0
|
0.0
|
| Net cash provided (used) by investing activities |
|
173.3
|
236.3
|
(288.7)
|
| FINANCING ACTIVITIES |
|
|
|
|
| Net proceeds from issuance of common shares |
|
0.0
|
0.0
|
|
| Proceeds from issuance of debt |
|
0.0
|
|
0.0
|
| Debt issuance costs |
|
0.0
|
0.0
|
0.0
|
| Borrowings under credit facilities |
|
|
0.0
|
0.0
|
| Repayment under credit facilities |
|
|
0.0
|
0.0
|
| Repayments on equipment loans |
|
|
0.0
|
0.0
|
| Repurchase of debt |
|
0.0
|
0.0
|
0.0
|
| Acquisition of noncontrolling interest |
|
0.0
|
|
|
| Distributions of partnership equity |
|
0.0
|
0.0
|
0.0
|
| Preferred stock dividends |
|
|
|
0.0
|
| Intercompany financing |
|
173.3
|
236.3
|
(288.7)
|
| Other financing activities |
|
0.0
|
0.0
|
0.0
|
| Net cash provided (used) by financing activities |
|
173.3
|
236.3
|
(288.7)
|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH |
|
0.0
|
0.0
|
0.0
|
| 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
|
0.0
|
| CASH AND CASH EQUIVALENTS AT END OF YEAR |
|
0.0
|
0.0
|
0.0
|
| Parent [Member] | Reportable Legal Entities [Member] |
|
|
|
|
| Net cash provided (used) by operating activities |
|
(166.8)
|
(275.7)
|
65.6
|
| INVESTING ACTIVITIES |
|
|
|
|
| Purchase of property, plant and equipment |
|
3.4
|
6.2
|
6.9
|
| Intercompany investing |
|
225.7
|
356.6
|
(205.8)
|
| Other investing activities |
|
(7.7)
|
0.4
|
0.0
|
| Net cash provided (used) by investing activities |
|
(214.6)
|
(350.8)
|
212.7
|
| FINANCING ACTIVITIES |
|
|
|
|
| Net proceeds from issuance of common shares |
|
661.3
|
287.4
|
|
| Proceeds from issuance of debt |
|
1,771.5
|
|
503.5
|
| Debt issuance costs |
|
(28.6)
|
(5.2)
|
(33.6)
|
| Borrowings under credit facilities |
|
|
105.0
|
296.8
|
| Repayment under credit facilities |
|
|
(105.0)
|
(296.8)
|
| Repayments on equipment loans |
|
|
(95.6)
|
(43.6)
|
| Repurchase of debt |
|
(1,720.7)
|
(305.4)
|
(225.9)
|
| Acquisition of noncontrolling interest |
|
(105.0)
|
|
|
| Distributions of partnership equity |
|
0.0
|
0.0
|
0.0
|
| Preferred stock dividends |
|
|
|
(51.2)
|
| Intercompany financing |
|
45.0
|
117.0
|
80.0
|
| Other financing activities |
|
(5.8)
|
(0.6)
|
(5.0)
|
| Net cash provided (used) by financing activities |
|
617.7
|
(2.4)
|
224.2
|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH |
|
0.0
|
0.0
|
0.0
|
| INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |
|
665.5
|
72.7
|
77.1
|
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR |
210.7
|
283.4
|
210.7
|
133.6
|
| CASH AND CASH EQUIVALENTS AT END OF YEAR |
|
948.9
|
283.4
|
210.7
|
| Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |
|
|
|
|
| Net cash provided (used) by operating activities |
|
430.4
|
462.9
|
(23.7)
|
| INVESTING ACTIVITIES |
|
|
|
|
| Purchase of property, plant and equipment |
|
80.6
|
60.0
|
68.2
|
| Intercompany investing |
|
(7.4)
|
(3.3)
|
(2.9)
|
| Other investing activities |
|
3.4
|
10.8
|
(27.6)
|
| Net cash provided (used) by investing activities |
|
84.6
|
52.5
|
98.7
|
| FINANCING ACTIVITIES |
|
|
|
|
| Net proceeds from issuance of common shares |
|
0.0
|
0.0
|
|
| Proceeds from issuance of debt |
|
0.0
|
|
0.0
|
| Debt issuance costs |
|
0.0
|
0.0
|
0.0
|
| Borrowings under credit facilities |
|
|
0.0
|
0.0
|
| Repayment under credit facilities |
|
|
0.0
|
0.0
|
| Repayments on equipment loans |
|
|
0.0
|
0.0
|
| Repurchase of debt |
|
0.0
|
0.0
|
0.0
|
| Acquisition of noncontrolling interest |
|
0.0
|
|
|
| Distributions of partnership equity |
|
(52.9)
|
(59.9)
|
(40.6)
|
| Preferred stock dividends |
|
|
|
0.0
|
| Intercompany financing |
|
(288.8)
|
(339.9)
|
188.5
|
| Other financing activities |
|
(4.5)
|
(9.9)
|
(25.0)
|
| Net cash provided (used) by financing activities |
|
(346.2)
|
(409.7)
|
122.9
|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH |
|
0.0
|
0.0
|
0.0
|
| INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |
|
(0.4)
|
0.7
|
0.5
|
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR |
1.8
|
2.5
|
1.8
|
1.3
|
| CASH AND CASH EQUIVALENTS AT END OF YEAR |
|
2.1
|
2.5
|
1.8
|
| Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |
|
|
|
|
| Net cash provided (used) by operating activities |
|
74.5
|
115.8
|
(4.0)
|
| INVESTING ACTIVITIES |
|
|
|
|
| Purchase of property, plant and equipment |
|
67.7
|
2.9
|
5.7
|
| Intercompany investing |
|
(45.0)
|
(117.0)
|
(80.0)
|
| Other investing activities |
|
0.0
|
0.0
|
5.2
|
| Net cash provided (used) by investing activities |
|
112.7
|
119.9
|
80.5
|
| FINANCING ACTIVITIES |
|
|
|
|
| Net proceeds from issuance of common shares |
|
0.0
|
0.0
|
|
| Proceeds from issuance of debt |
|
0.0
|
|
0.0
|
| Debt issuance costs |
|
0.0
|
0.0
|
0.0
|
| Borrowings under credit facilities |
|
|
0.0
|
13.0
|
| Repayment under credit facilities |
|
|
0.0
|
(13.0)
|
| Repayments on equipment loans |
|
|
0.0
|
(1.8)
|
| Repurchase of debt |
|
0.0
|
0.0
|
0.0
|
| Acquisition of noncontrolling interest |
|
0.0
|
|
|
| Distributions of partnership equity |
|
0.0
|
0.0
|
0.0
|
| Preferred stock dividends |
|
|
|
0.0
|
| Intercompany financing |
|
70.5
|
(13.4)
|
20.2
|
| Other financing activities |
|
(16.4)
|
(17.2)
|
(15.8)
|
| Net cash provided (used) by financing activities |
|
54.1
|
(30.6)
|
2.6
|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH |
|
3.3
|
(0.5)
|
(1.4)
|
| INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS |
|
19.2
|
(35.2)
|
(83.3)
|
| CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR |
$ 72.7
|
37.5
|
72.7
|
156.0
|
| CASH AND CASH EQUIVALENTS AT END OF YEAR |
|
$ 56.7
|
$ 37.5
|
$ 72.7
|