entergy texas , inc . and subsidiaries management 2019s financial discussion and analysis in addition to the contractual obligations given above , entergy texas expects to contribute approximately $ 17 million to its qualified pension plans and approximately $ 3.2 million to other postretirement health care and life insurance plans in 2017 , although the 2017 required pension contributions will be known with more certainty when the january 1 , 2017 valuations are completed , which is expected by april 1 , 2017 . see 201ccritical accounting estimates - qualified pension and other postretirement benefits 201d below for a discussion of qualified pension and other postretirement benefits funding . also in addition to the contractual obligations , entergy texas has $ 15.6 million of unrecognized tax benefits and interest net of unused tax attributes and payments for which the timing of payments beyond 12 months cannot be reasonably estimated due to uncertainties in the timing of effective settlement of tax positions . see note 3 to the financial statements for additional information regarding unrecognized tax benefits . in addition to routine capital spending to maintain operations , the planned capital investment estimate for entergy texas includes specific investments such as the montgomery county power station discussed below ; transmission projects to enhance reliability , reduce congestion , and enable economic growth ; distribution spending to enhance reliability and improve service to customers , including initial investment to support advanced metering ; system improvements ; and other investments . estimated capital expenditures are subject to periodic review and modification and may vary based on the ongoing effects of regulatory constraints and requirements , environmental compliance , business opportunities , market volatility , economic trends , business restructuring , changes in project plans , and the ability to access capital . management provides more information on long-term debt in note 5 to the financial statements . as discussed above in 201ccapital structure , 201d entergy texas routinely evaluates its ability to pay dividends to entergy corporation from its earnings . sources of capital entergy texas 2019s sources to meet its capital requirements include : 2022 internally generated funds ; 2022 cash on hand ; 2022 debt or preferred stock issuances ; and 2022 bank financing under new or existing facilities . entergy texas may refinance , redeem , or otherwise retire debt prior to maturity , to the extent market conditions and interest and dividend rates are favorable . all debt and common and preferred stock issuances by entergy texas require prior regulatory approval . debt issuances are also subject to issuance tests set forth in its bond indenture and other agreements . entergy texas has sufficient capacity under these tests to meet its foreseeable capital needs . entergy texas 2019s receivables from or ( payables to ) the money pool were as follows as of december 31 for each of the following years. .
what is the dollar amount in millions of letters of credit that can be issued under the august 2021 credit facility?
see note 4 to the financial statements for a description of the money pool . entergy texas has a credit facility in the amount of $ 150 million scheduled to expire in august 2021 . the credit facility allows entergy texas to issue letters of credit against 50% ( 50 % ) of the borrowing capacity of the facility . as of december 31 , 2016 , there were no cash borrowings and $ 4.7 million of letters of credit outstanding under the credit facility . in addition , entergy texas is a party to an uncommitted letter of credit facility as a means to post collateral .