Other Financial Statement Details - Accounts Receivable (Details) - USD ($) $ in Millions	Sep. 30, 2021	Mar. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable, gross	$ 991.2	$ 1,002.9
Less: allowance for expected credit losses	5.6	5.2
Total accounts receivable, net	985.6	997.7
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable, gross	979.3	991.6
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable, gross	$ 11.9	$ 11.3