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Capital Management and Dividends (Tables) | 12 Months Ended
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Mar. 31, 2019
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Summary of Dividends Declared or Paid | The following table summarizes the dividends paid during the fiscal years 2019, 2018 and 2017:
(Millions of US dollars) | US Cents/Security |  | US$ Millions Total Amount |  | Announcement Date |  | Record Date |  | Payment Date
FY 2019 first half dividend | 0.10 |  | 43.6 |  | 8 November 2018 |  | 12 December 2018 |  | 22 February 2019
FY 2018 second half dividend | 0.30 |  | 128.5 |  | 22 May 2018 |  | 7 June 2018 |  | 3 August 2018
FY 2018 first half dividend | 0.10 |  | 46.2 |  | 9 November 2017 |  | 13 December 2017 |  | 23 February 2018
FY 2017 second half dividend | 0.28 |  | 131.3 |  | 18 May 2017 |  | 8 June 2017 |  | 4 August 2017
FY 2017 first half dividend | 0.10 |  | 46.6 |  | 17 November 2016 |  | 21 December 2016 |  | 24 February 2017
FY 2016 second half dividend | 0.29 |  | 130.2 |  | 19 May 2016 |  | 9 June 2016 |  | 5 August 2016

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