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v3.19.1

Revenues Revenues (Tables) | 12 Months Ended
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Mar. 31, 2019
Revenue from Contract with Customer [Abstract] |
Reconciliation of Revenue from Segments to Consolidated [Table Text Block] | The following represents the Company's disaggregated revenues for the years ended 31 March 2019, 2018 and 2017:
| Year Ended 31 March 2019
(Millions of US dollars) | North America Fiber Cement |  | Asia Pacific Fiber Cement |  | Europe Building Products |  | Other Businesses |  | Consolidated
Fiber cement revenues | $ | 1,676.9 |  |  | $ | 446.8 |  |  | $ | 35.8 |  |  | $ | — |  |  | $ | 2,159.5 |
Fiber gypsum revenues | — |  |  | — |  |  | 332.5 |  |  | — |  |  | 332.5 |
Other revenues | — |  |  | — |  |  | — |  |  | 14.6 |  |  | 14.6 |
Total revenues | $ | 1,676.9 |  |  | $ | 446.8 |  |  | $ | 368.3 |  |  | $ | 14.6 |  |  | $ | 2,506.6 |
| Year Ended 31 March 2018
(Millions of US dollars) | North America Fiber Cement |  | Asia Pacific Fiber Cement |  | Europe Building Products |  | Other Businesses |  | Consolidated
Fiber cement revenues | $ | 1,578.1 |  |  | $ | 425.4 |  |  | $ | 36.3 |  |  | $ | — |  |  | $ | 2,039.8 |
Fiber gypsum revenues | — |  |  | — |  |  | — |  |  | — |  |  | — |
Other revenues | — |  |  | — |  |  | — |  |  | 14.7 |  |  | 14.7 |
Total revenues | $ | 1,578.1 |  |  | $ | 425.4 |  |  | $ | 36.3 |  |  | $ | 14.7 |  |  | $ | 2,054.5 |
| Year Ended 31 March 2017
(Millions of US dollars) | North America Fiber Cement |  | Asia Pacific Fiber Cement |  | Europe Building Products |  | Other Businesses |  | Consolidated
Fiber cement revenues | $ | 1,493.4 |  |  | $ | 370.6 |  |  | $ | 41.2 |  |  | $ | — |  |  | $ | 1,905.2 |
Fiber gypsum revenues | — |  |  | — |  |  | — |  |  | — |  |  | — |
Other revenues | — |  |  | — |  |  | — |  |  | 16.4 |  |  | 16.4 |
Total revenues | $ | 1,493.4 |  |  | $ | 370.6 |  |  | $ | 41.2 |  |  | $ | 16.4 |  |  | $ | 1,921.6 |

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- Definition Tabular disclosure of all significant reconciling items in the reconciliation of total revenues from reportable segments to the entity's consolidated revenues. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8924-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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