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Property, Plant and Equipment (Tables) | 12 Months Ended
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Mar. 31, 2015
Property, Plant and Equipment [Abstract] |
Components of Property, Plant and Equipment | Property, plant and equipment consist of the following components:
|  |  |  |  |  |  |  | Machinery |  |  | Construction |  |  |  |
(Millions of US dollars) |  |  |  |  |  |  |  | and |  |  | in |  |  |  |
Cost or valuation: |  | Land |  |  | Buildings |  |  | Equipment |  |  | Progress 1 |  |  | Total |
At 31 March 2013 |  | $ | 18.5 |  |  | $ | 210.2 |  |  | $ | 994.7 |  |  | $ | 61.1 |  |  | $ | 1,284.5 |
Additions |  |  | 11.7 |  |  |  | 18.9 |  |  |  | 39.8 |  |  |  | 54.8 |  |  |  | 125.2 |
Disposals |  |  | - |  |  |  | - |  |  |  | (2.2) |  |  |  | - |  |  |  | (2.2) |
Other 2 |  |  | (1.5) |  |  |  | (15.6) |  |  |  | (43.7) |  |  |  | (0.5) |  |  |  | (61.3) |
Exchange differences |  |  | - |  |  |  | (1.0) |  |  |  | (27.5) |  |  |  | - |  |  |  | (28.5) |
At 31 March 2014 |  | $ | 28.7 |  |  | $ | 212.5 |  |  | $ | 961.1 |  |  | $ | 115.4 |  |  | $ | 1,317.7 |
Additions 3 |  |  | 41.5 |  |  |  | 30.2 |  |  |  | 72.7 |  |  |  | 133.5 |  |  |  | 277.9 |
Disposals 4 |  |  | - |  |  |  | (1.7) |  |  |  | (6.6) |  |  |  | - |  |  |  | (8.3) |
Exchange differences |  |  | - |  |  |  | (1.2) |  |  |  | (52.6) |  |  |  | - |  |  |  | (53.8) |
At 31 March 2015 |  | $ | 70.2 |  |  | $ | 239.8 |  |  | $ | 974.6 |  |  | $ | 248.9 |  |  | $ | 1,533.5 |
Accumulated depreciation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At 31 March 2013 |  | $ | - |  |  | $ | (85.2) |  |  | $ | (540.4) |  |  | $ | - |  |  | $ | (625.6) |
Charge for the year |  |  | - |  |  |  | (9.1) |  |  |  | (52.2) |  |  |  | - |  |  |  | (61.3) |
Disposals |  |  | - |  |  |  | - |  |  |  | 1.5 |  |  |  | - |  |  |  | 1.5 |
Other 2 |  |  | - |  |  |  | 12.4 |  |  |  | 40.0 |  |  |  | - |  |  |  | 52.4 |
Exchange differences |  |  | - |  |  |  | 1.0 |  |  |  | 17.1 |  |  |  | - |  |  |  | 18.1 |
At 31 March 2014 |  | $ | - |  |  | $ | (80.9) |  |  | $ | (534.0) |  |  | $ | - |  |  | $ | (614.9) |
Charge for the year |  |  | - |  |  |  | (9.3) |  |  |  | (60.9) |  |  |  | - |  |  |  | (70.2) |
Disposals 4 |  |  | - |  |  |  | 0.8 |  |  |  | 6.3 |  |  |  | - |  |  |  | 7.1 |
Exchange differences |  |  | - |  |  |  | 1.2 |  |  |  | 23.4 |  |  |  | - |  |  |  | 24.6 |
At 31 March 2015 |  | $ | - |  |  | $ | (88.2) |  |  | $ | (565.2) |  |  | $ | - |  |  | $ | (653.4) |
Net book amount: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At 31 March 2014 |  | $ | 28.7 |  |  | $ | 131.6 |  |  | $ | 427.1 |  |  | $ | 115.4 |  |  | $ | 702.8 |
At 31 March 2015 |  | $ | 70.2 |  |  | $ | 151.6 |  |  | $ | 409.4 |  |  | $ | 248.9 |  |  | $ | 880.1 |
1 | Construction in progress is presented net of assets transferred into service.
2 | Reflects the reclassification of the Blandon assets and Australian Pipes assets which were classified as held for sale and were recorded in Prepaid expenses and other current assets on the consolidated balance sheets at 31 March 2014 and 2015.
3 | Includes US$1.7 million of capitalized interest for the year ended 31 March 2015.
4 | This balance includes the accounting impact associated with the purchase of the Company’s previously leased facility at Rosehill.

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 + Details
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