Summary of Significant Accounting Policies - New Accouting Standards (Details) - Forecast - Accounting Standards Update 2016-02 $ in Millions	Oct. 01, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset recorded with adoption of new accounting standards	$ 10
Lease liability recorded with adoption of new accounting standards	$ 10