Other Financial Information - Note Receivable and Deposit (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract manufacturer deposit (non-interest bearing)	$ 43.6	$ 46.0
Total	43.6	124.9
Junos Pulse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pulse Note (including accumulated interest paid in kind)	$ 0.0	$ 78.9