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Additional Financial Information (Other Assets) (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Mar. 31, 2017
--- | --- | ---
Other current assets |  |  |
Prepaid expenses and other |  | $ 34.1 | $ 26.1
Product inventory |  | 20.3 | 23.9
Tax credits receivable |  | 141.4 | 145.9
Other current assets |  | 195.8 | 195.9
Other non-current assets |  |  |
Prepaid expenses and other |  | 23.8 | 39.9
Accounts receivable | [1] | 325.2 | 313.1
Tax credits receivable |  | 109.6 | 119.8
Other non-current assets |  | 458.6 | 472.8
Unamortized discount on long-term receivable |  | $ 18.0 | $ 17.6
[1] | Unamortized discounts on long-term, non-interest bearing receivables were $18.0 million and $17.6 million at March 31, 2018 and 2017, respectively.

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