credit lines devon has a $ 3.0 billion syndicated , unsecured revolving line of credit ( the senior credit facility ) . the maturity date for $ 30 million of the senior credit facility is october 24 , 2017 . the maturity date for $ 164 million of the senior credit facility is october 24 , 2018 . the maturity date for the remaining $ 2.8 billion is october 24 , 2019