Quarterly report pursuant to Section 13 or 15(d)

Debt - Revolving Credit Agreement (Details)

v3.10.0.1
Debt - Revolving Credit Agreement (Details) - Revolving credit agreement
9 Months Ended
Sep. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 1,500,000,000  
Borrowings outstanding $ 100,000,000 $ 150,000,000
Ratio of debt to EBITDA 3.5