Condensed Consolidating Financial Statements (Condensed Cash Flow Statement) (Details) - USD ($) $ in Millions | 3 Months Ended | | | |
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2016 |
Condensed Financial Statements, Captions [Line Items] | | | | | |
Net cash provided (used) by operating activities | $ (38.6) | $ 11.2 | | | |
Investing activities | | | | | |
Payments for property, plant and equipment | (62.6) | (122) | | | |
Equity contributions in subsidiaries | 0 | | | | |
Return of investment in subsidiaries | 0 | 0 | | | |
Other | (0.4) | (0.1) | | | |
Net cash used by investing activities | (63) | (122.1) | | | |
Financing activities | | | | | |
Proceeds from revolving credit facilities | 159.5 | 110 | | | |
Payments on revolving credit facilities | (294.5) | (0.2) | | | |
Proceeds from senior secured notes, inclusive of premiums | 263.8 | 0 | | | |
Payments on other long-term debt | (2.3) | (0.3) | | | |
Debt issuance costs | (1.8) | (0.4) | | | |
Proceeds from intercompany equity contributions | 0 | | | | |
Dividends paid | 0 | 0 | | | |
Other | (1.2) | (0.4) | | | |
Net cash provided by financing activities | 123.5 | 108.7 | | | |
Effect of exchange rate differences on cash, cash equivalents and restricted cash | 0.6 | 1.9 | | | |
Net increase (decrease) in cash, cash equivalents and restricted cash | 22.5 | (0.3) | | | |
Cash, cash equivalents and restricted cash at beginning of period | 55.6 | 62.2 | | | |
Cash, cash equivalents and restricted cash at end of period | 78.1 | 61.9 | | | |
Cash and cash equivalents | | | $ 74.6 | $ 55.6 | $ 61.9 |
Restricted cash (included in Other current assets) | | | 3.5 | | 0 |
Cash, cash equivalents and restricted cash | 55.6 | 62.2 | 78.1 | 55.6 | 61.9 |
Reportable Legal Entities | Aleris Corporation (Parent) | | | | | |
Condensed Financial Statements, Captions [Line Items] | | | | | |
Net cash provided (used) by operating activities | 1.1 | 0.4 | | | |
Investing activities | | | | | |
Payments for property, plant and equipment | 0 | 0 | | | |
Equity contributions in subsidiaries | 0 | | | | |
Return of investment in subsidiaries | 0 | 0 | | | |
Other | 0 | 0 | | | |
Net cash used by investing activities | 0 | 0 | | | |
Financing activities | | | | | |
Proceeds from revolving credit facilities | 0 | 0 | | | |
Payments on revolving credit facilities | 0 | 0 | | | |
Proceeds from senior secured notes, inclusive of premiums | 0 | | | | |
Payments on other long-term debt | 0 | 0 | | | |
Debt issuance costs | | 0 | | | |
Proceeds from intercompany equity contributions | 0 | | | | |
Dividends paid | 0 | 0 | | | |
Other | (1.1) | (0.4) | | | |
Net cash provided by financing activities | (1.1) | (0.4) | | | |
Effect of exchange rate differences on cash, cash equivalents and restricted cash | 0 | 0 | | | |
Net increase (decrease) in cash, cash equivalents and restricted cash | 0 | 0 | | | |
Cash, cash equivalents and restricted cash at beginning of period | 0 | 0 | | | |
Cash, cash equivalents and restricted cash at end of period | 0 | 0 | | | |
Cash and cash equivalents | | | 0 | 0 | |
Restricted cash (included in Other current assets) | | | 0 | | |
Cash, cash equivalents and restricted cash | 0 | 0 | 0 | 0 | 0 |
Reportable Legal Entities | Aleris International, Inc. | | | | | |
Condensed Financial Statements, Captions [Line Items] | | | | | |
Net cash provided (used) by operating activities | 303.5 | (115) | | | |
Investing activities | | | | | |
Payments for property, plant and equipment | 0 | 0 | | | |
Equity contributions in subsidiaries | (406.6) | | | | |
Return of investment in subsidiaries | 8.3 | 5 | | | |
Other | 0 | 0 | | | |
Net cash used by investing activities | (398.3) | 5 | | | |
Financing activities | | | | | |
Proceeds from revolving credit facilities | 55 | 110 | | | |
Payments on revolving credit facilities | (185) | 0 | | | |
Proceeds from senior secured notes, inclusive of premiums | 263.8 | | | | |
Payments on other long-term debt | 0 | 0.1 | | | |
Debt issuance costs | (1.8) | (0.4) | | | |
Proceeds from intercompany equity contributions | 0 | | | | |
Dividends paid | 0 | 0 | | | |
Other | 0 | 0.3 | | | |
Net cash provided by financing activities | 132 | 110 | | | |
Effect of exchange rate differences on cash, cash equivalents and restricted cash | 0 | 0 | | | |
Net increase (decrease) in cash, cash equivalents and restricted cash | 37.2 | 0 | | | |
Cash, cash equivalents and restricted cash at beginning of period | 5.5 | 0 | | | |
Cash, cash equivalents and restricted cash at end of period | 42.7 | 0 | | | |
Cash and cash equivalents | | | 42.7 | 5.5 | |
Restricted cash (included in Other current assets) | | | 0 | | |
Cash, cash equivalents and restricted cash | 5.5 | 0 | 42.7 | 5.5 | 0 |
Reportable Legal Entities | Guarantor Subsidiaries | | | | | |
Condensed Financial Statements, Captions [Line Items] | | | | | |
Net cash provided (used) by operating activities | (355.6) | 100.3 | | | |
Investing activities | | | | | |
Payments for property, plant and equipment | (52.7) | (99.7) | | | |
Equity contributions in subsidiaries | 0 | | | | |
Return of investment in subsidiaries | 5.8 | 0.1 | | | |
Other | (0.4) | 0 | | | |
Net cash used by investing activities | (47.3) | (99.6) | | | |
Financing activities | | | | | |
Proceeds from revolving credit facilities | 0 | 0 | | | |
Payments on revolving credit facilities | 0 | 0 | | | |
Proceeds from senior secured notes, inclusive of premiums | 0 | | | | |
Payments on other long-term debt | (0.1) | (0.3) | | | |
Debt issuance costs | 0 | 0 | | | |
Proceeds from intercompany equity contributions | 402.6 | | | | |
Dividends paid | 0 | (0.3) | | | |
Other | 0.4 | (0.1) | | | |
Net cash provided by financing activities | 402.9 | (0.7) | | | |
Effect of exchange rate differences on cash, cash equivalents and restricted cash | 0 | 0 | | | |
Net increase (decrease) in cash, cash equivalents and restricted cash | 0 | 0 | | | |
Cash, cash equivalents and restricted cash at beginning of period | 0 | 0 | | | |
Cash, cash equivalents and restricted cash at end of period | 0 | 0 | | | |
Cash and cash equivalents | | | 0 | 0 | |
Restricted cash (included in Other current assets) | | | 0 | | |
Cash, cash equivalents and restricted cash | 0 | 0 | 0 | 0 | 0 |
Reportable Legal Entities | Non-Guarantor Subsidiaries | | | | | |
Condensed Financial Statements, Captions [Line Items] | | | | | |
Net cash provided (used) by operating activities | 11.8 | 26 | | | |
Investing activities | | | | | |
Payments for property, plant and equipment | (9.9) | (22.3) | | | |
Equity contributions in subsidiaries | 0 | | | | |
Return of investment in subsidiaries | 0 | 0 | | | |
Other | 0 | (0.1) | | | |
Net cash used by investing activities | (9.9) | (22.4) | | | |
Financing activities | | | | | |
Proceeds from revolving credit facilities | 104.5 | 0 | | | |
Payments on revolving credit facilities | (109.5) | (0.2) | | | |
Proceeds from senior secured notes, inclusive of premiums | 0 | | | | |
Payments on other long-term debt | (2.2) | (0.1) | | | |
Debt issuance costs | 0 | 0 | | | |
Proceeds from intercompany equity contributions | 4 | | | | |
Dividends paid | (14.4) | (5.3) | | | |
Other | (0.5) | (0.2) | | | |
Net cash provided by financing activities | (18.1) | (5.8) | | | |
Effect of exchange rate differences on cash, cash equivalents and restricted cash | 0.6 | 1.9 | | | |
Net increase (decrease) in cash, cash equivalents and restricted cash | (15.6) | (0.3) | | | |
Cash, cash equivalents and restricted cash at beginning of period | 53.3 | 62.2 | | | |
Cash, cash equivalents and restricted cash at end of period | 37.7 | 61.9 | | | |
Cash and cash equivalents | | | 34.2 | 53.3 | |
Restricted cash (included in Other current assets) | | | 3.5 | | |
Cash, cash equivalents and restricted cash | 53.3 | 62.2 | 37.7 | 53.3 | 61.9 |
Eliminations | | | | | |
Condensed Financial Statements, Captions [Line Items] | | | | | |
Net cash provided (used) by operating activities | 0.6 | (0.5) | | | |
Investing activities | | | | | |
Payments for property, plant and equipment | 0 | 0 | | | |
Equity contributions in subsidiaries | 406.6 | | | | |
Return of investment in subsidiaries | (14.1) | (5.1) | | | |
Other | 0 | 0 | | | |
Net cash used by investing activities | 392.5 | (5.1) | | | |
Financing activities | | | | | |
Proceeds from revolving credit facilities | 0 | 0 | | | |
Payments on revolving credit facilities | 0 | 0 | | | |
Proceeds from senior secured notes, inclusive of premiums | 0 | | | | |
Payments on other long-term debt | 0 | 0 | | | |
Debt issuance costs | 0 | 0 | | | |
Proceeds from intercompany equity contributions | (406.6) | | | | |
Dividends paid | 14.4 | 5.6 | | | |
Other | 0 | 0 | | | |
Net cash provided by financing activities | (392.2) | 5.6 | | | |
Effect of exchange rate differences on cash, cash equivalents and restricted cash | 0 | 0 | | | |
Net increase (decrease) in cash, cash equivalents and restricted cash | 0.9 | 0 | | | |
Cash, cash equivalents and restricted cash at beginning of period | (3.2) | 0 | | | |
Cash, cash equivalents and restricted cash at end of period | (2.3) | 0 | | | |
Cash and cash equivalents | | | (2.3) | (3.2) | |
Restricted cash (included in Other current assets) | | | 0 | | |
Cash, cash equivalents and restricted cash | $ (3.2) | $ 0 | $ (2.3) | $ (3.2) | $ 0 |