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Condensed consolidating financial information - Cash Flows (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net cash provided by (used in) operating activities | $ (33.0) | $ (11.3)
Net cash provided by (used in) investing activities |  |
Purchase of property, plant and equipment | (3.5) | (9.0)
Proceeds from sale of property, plant and equipment |  | 13.5
Intercompany transactions | 0.0 | 0.0
Net cash provided by (used in) investing activities | (3.5) | 4.5
Net cash provided by (used in) financing activities |  |
Borrowings under revolving credit facilities | 0.3 | 0.2
Repayments under revolving credit facilities | (0.3) | (0.2)
Issuance of common stock | 0.1 | 0.0
Intercompany transactions | 0.0 | 0.0
Net cash provided by financing activities | 0.1 | 0.0
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH | (36.4) | (6.8)
Cash, cash equivalents and restricted cash, beginning of period | 168.0 | 133.5
Cash, cash equivalents and restricted cash, end of period | 131.6 | 126.7
Consolidating Adjustments [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net cash provided by (used in) operating activities | 0.0 | 0.0
Net cash provided by (used in) investing activities |  |
Purchase of property, plant and equipment | 0.0 | 0.0
Proceeds from sale of property, plant and equipment |  | 0.0
Intercompany transactions | 23.8 | (30.4)
Net cash provided by (used in) investing activities | 23.8 | (30.4)
Net cash provided by (used in) financing activities |  |
Borrowings under revolving credit facilities | 0.0 | 0.0
Repayments under revolving credit facilities | 0.0 | 0.0
Issuance of common stock | 0.0 |
Intercompany transactions | (23.8) | 30.4
Net cash provided by financing activities | (23.8) | 30.4
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH | 0.0 | 0.0
Cash, cash equivalents and restricted cash, beginning of period | 0.0 | 0.0
Cash, cash equivalents and restricted cash, end of period | 0.0 | 0.0
The Company [Member] | Reportable Legal Entities [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net cash provided by (used in) operating activities | (26.8) | (1.1)
Net cash provided by (used in) investing activities |  |
Purchase of property, plant and equipment | (1.5) | (4.4)
Proceeds from sale of property, plant and equipment |  | 0.0
Intercompany transactions | (23.8) | 19.2
Net cash provided by (used in) investing activities | (25.3) | 14.8
Net cash provided by (used in) financing activities |  |
Borrowings under revolving credit facilities | 0.3 | 0.2
Repayments under revolving credit facilities | (0.3) | (0.2)
Issuance of common stock | 0.1 |
Intercompany transactions | (3.8) | (11.2)
Net cash provided by financing activities | (3.7) | (11.2)
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH | (55.8) | 2.5
Cash, cash equivalents and restricted cash, beginning of period | 64.3 | 36.7
Cash, cash equivalents and restricted cash, end of period | 8.5 | 39.2
Combined Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net cash provided by (used in) operating activities | (26.8) | (21.8)
Net cash provided by (used in) investing activities |  |
Purchase of property, plant and equipment | (0.4) | (2.3)
Proceeds from sale of property, plant and equipment |  | 0.0
Intercompany transactions | 0.0 | 23.6
Net cash provided by (used in) investing activities | (0.4) | 21.3
Net cash provided by (used in) financing activities |  |
Borrowings under revolving credit facilities | 0.0 | 0.0
Repayments under revolving credit facilities | 0.0 | 0.0
Issuance of common stock | 0.0 |
Intercompany transactions | 27.2 | 0.8
Net cash provided by financing activities | 27.2 | 0.8
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH | 0.0 | 0.3
Cash, cash equivalents and restricted cash, beginning of period | 0.7 | 0.5
Cash, cash equivalents and restricted cash, end of period | 0.7 | 0.8
Combined Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net cash provided by (used in) operating activities | 20.6 | 11.6
Net cash provided by (used in) investing activities |  |
Purchase of property, plant and equipment | (1.6) | (2.3)
Proceeds from sale of property, plant and equipment |  | 13.5
Intercompany transactions | 0.0 | (12.4)
Net cash provided by (used in) investing activities | (1.6) | (1.2)
Net cash provided by (used in) financing activities |  |
Borrowings under revolving credit facilities | 0.0 | 0.0
Repayments under revolving credit facilities | 0.0 | 0.0
Issuance of common stock | 0.0 |
Intercompany transactions | 0.4 | (20.0)
Net cash provided by financing activities | 0.4 | (20.0)
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH | 19.4 | (9.6)
Cash, cash equivalents and restricted cash, beginning of period | 103.0 | 96.3
Cash, cash equivalents and restricted cash, end of period | $ 122.4 | $ 86.7

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