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Capital Stock (Unrecognized Compensation Cost) (Details) $ in Millions | 12 Months Ended
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Mar. 31, 2017 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Total Unrecognized Compensation Cost | $ 112.7
Stock Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Total Unrecognized Compensation Cost | $ 71.1
Weighted Average Remaining Years | 2 years 3 months 18 days
Restricted Share Units (RSUs) |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Total Unrecognized Compensation Cost | $ 41.6
Weighted Average Remaining Years | 1 year 9 months 18 days

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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