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Special Charges and Other, Net - Summary of Activity in Special Charges and Other, Net (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Restructuring |  |  |  |
Employee separation costs |  | $ 6.0 | $ 65.3 | $ 1.2
Gain on sale of assets |  | (1.5) | 0.0 | (4.4)
Impairment charges |  | 3.2 | 3.6 | 0.0
Contract exit costs |  | 13.4 | (4.7) | 0.7
Other |  | 9.9 | (0.3) | 0.0
Legal contingencies |  | 15.7 | (30.2) | 0.0
Non-restructuring contract exit costs and other |  | 0.0 | 0.0 | 20.0
Total | [1] | $ 46.7 | $ 33.7 | $ 17.5
[1] | Year ended March 31,(1) Includes share-based compensation expense as follows: Cost of sales$20.9 $14.9 $13.8Research and development$82.9 $72.0 $42.5Selling, general and administrative$66.4 $62.3 $36.9Special charges and other, net$— $17.2 $—

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