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Other Financial Statement Details - Accounts Receivable (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Mar. 31, 2020
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total accounts receivable, gross | $ 899.0 | $ 938.9
Less allowance for expected credit losses | 5.2 | 4.9
Total accounts receivable, net | 893.8 | 934.0
Trade accounts receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total accounts receivable, gross | 887.9 | 924.1
Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total accounts receivable, gross | $ 11.1 | $ 14.8

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