Other Financial Information - Note Receivable and Deposit (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract manufacturer deposit (non-interest bearing)	$ 46.0	$ 23.9
Total	124.9	92.9
Junos Pulse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pulse Note (including accumulated interest paid in kind)	$ 78.9	$ 69.0