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Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Mar. 31, 2015
Equity [Abstract] |
Amounts Reclassified Out of Accumulated Other Comprehensive Income | During the year ended 31 March 2015, there were reclassifications out of Accumulated other comprehensive income related to the de-designation of the cash-flow hedges.
(Millions of US dollars) |  | Pension and Post-Retirement Benefit Adjustment |  |  | Cash Flow Hedges |  |  | Foreign Currency Translation Adjustments |  |  | Total |
Balance at 31 March 2014 |  | $ | (0.3) |  |  | $ | 0.9 |  |  | $ | 32.5 |  |  | $ | 33.1 |
Other comprehensive loss before reclassifications |  |  | - |  |  |  | - |  |  |  | (32.9) |  |  | $ | (32.9) |
De-designation of cash flow hedges |  |  | - |  |  |  | (0.6) |  |  |  | - |  |  |  | (0.6) |
Net current-period other comprehensive loss |  |  | - |  |  |  | (0.6) |  |  |  | (32.9) |  |  |  | (33.5) |
Balance at 31 March 2015 |  | $ | (0.3) |  |  | $ | 0.3 |  |  | $ | (0.4) |  |  | $ | (0.4) |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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