entergy mississippi , inc . management 2019s financial discussion and analysis entergy mississippi 2019s receivables from or ( payables to ) the money pool were as follows as of december 31 for each of the following years. .
the company requested a net increase in revenue for bills rendered during calendar year 2015 . what would the increase have been , in millions , without the amount reflating to the new depreciation rates?
see note 4 to the financial statements for a description of the money pool . entergy mississippi has four separate credit facilities in the aggregate amount of $ 102.5 million scheduled to expire may 2017 . no borrowings were outstanding under the credit facilities as of december 31 , 2016 . in addition , entergy mississippi is a party to an uncommitted letter of credit facility as a means to post collateral to support its obligations under miso . as of december 31 , 2016 , a $ 7.1 million letter of credit was outstanding under entergy mississippi 2019s uncommitted letter of credit facility . see note 4 to the financial statements for additional discussion of the credit facilities . entergy mississippi obtained authorizations from the ferc through october 2017 for short-term borrowings not to exceed an aggregate amount of $ 175 million at any time outstanding and long-term borrowings and security issuances . see note 4 to the financial statements for further discussion of entergy mississippi 2019s short-term borrowing limits . state and local rate regulation and fuel-cost recovery the rates that entergy mississippi charges for electricity significantly influence its financial position , results of operations , and liquidity . entergy mississippi is regulated and the rates charged to its customers are determined in regulatory proceedings . a governmental agency , the mpsc , is primarily responsible for approval of the rates charged to customers . formula rate plan in june 2014 , entergy mississippi filed its first general rate case before the mpsc in almost 12 years . the rate filing laid out entergy mississippi 2019s plans for improving reliability , modernizing the grid , maintaining its workforce , stabilizing rates , utilizing new technologies , and attracting new industry to its service territory . entergy mississippi requested a net increase in revenue of $ 49 million for bills rendered during calendar year 2015 , including $ 30 million resulting from new depreciation rates to update the estimated service life of assets . in addition , the filing proposed , among other things : 1 ) realigning cost recovery of the attala and hinds power plant acquisitions from the power management rider to base rates ; 2 ) including certain miso-related revenues and expenses in the power management rider ; 3 ) power management rider changes that reflect the changes in costs and revenues that will accompany entergy mississippi 2019s withdrawal from participation in the system agreement ; and 4 ) a formula rate plan forward test year to allow for known changes in expenses and revenues for the rate effective period . entergy mississippi proposed maintaining the current authorized return on common equity of 10.59% ( 10.59 % ) . in october 2014 , entergy mississippi and the mississippi public utilities staff entered into and filed joint stipulations that addressed the majority of issues in the proceeding . the stipulations provided for : 2022 an approximate $ 16 million net increase in revenues , which reflected an agreed upon 10.07% ( 10.07 % ) return on common equity ; 2022 revision of entergy mississippi 2019s formula rate plan by providing entergy mississippi with the ability to reflect known and measurable changes to historical rate base and certain expense amounts ; resolving uncertainty around and obviating the need for an additional rate filing in connection with entergy mississippi 2019s withdrawal from participation in the system agreement ; updating depreciation rates ; and moving costs associated with the attala and hinds generating plants from the power management rider to base rates; .