Other Financial Statement Details - Accounts Receivable (Details) - USD ($) $ in Millions	Mar. 31, 2020	Mar. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable, gross	$ 938.9	$ 882.6
Less allowance for doubtful accounts	4.9	2.0
Total accounts receivable, net	934.0	880.6
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable, gross	924.1	875.8
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable, gross	$ 14.8	$ 6.8