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Business and Basis of Presentation (Income Taxes) (Details) $ in Millions | 12 Months Ended
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Mar. 31, 2018 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Net gain related to deferred tax liability | $ 267.0
Net gain related to the lower blended tax rate | 3.2
Net gain | 270.2
Repatriation charge | $ 1.9

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