Derivatives (Details) - Foreign Currency Forward £ in Millions, $ in Millions	Jun. 30, 2020 USD ($)	Jun. 30, 2020 GBP (£)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 GBP (£)
Derivative [Line Items]
Derivative liability, notional amount | £		£ 50.3
Derivative asset, notional amount | £				£ 53.0
Other Current Liabilities
Derivative [Line Items]
Derivative liability | $	$ 1.2
Receivables
Derivative [Line Items]
Derivative asset | $			$ 3.1