Debt - Schedule of Debt Issuance (Details) - Subsequent Event	Oct. 01, 2019 USD ($)
Sub-series A-1 Bonds
Debt Instrument [Line Items]
Par amount	$ 200,000,000
Interest rate	2.00%
Sub-series A-2 Bonds
Debt Instrument [Line Items]
Par amount	$ 200,000,000
Interest rate	2.10%
Sub-series A-3 Bonds
Debt Instrument [Line Items]
Par amount	$ 200,000,000
Interest rate	2.20%