As of September 30, 2017, we carried a total debt balance (including accrued interest) of €4,804.6 million, of which €3,323.7 million principal amount is owed under our 2017 Amended Senior Credit Facility, including €45.0 million drawn under our revolving credit facilities, and €780.0 million principal amount is related to the Senior Secured Fixed Rate Notes with maturities ranging from 2024 through 2027. Our total debt balance at September 30, 2017 also included €188.3 million of short-term debt related to our vendor financing program and €23.7 million for the outstanding portion of the 3G mobile spectrum including accrued interest. The remainder primarily represents the capital lease obligations associated with the Interkabel Acquisition.
In April 2017, we successfully syndicated and priced a new €1.33 billion Term Loan facility ("Facility AH") due on March 31, 2026 and a new USD 1.8 billion Term Loan facility ("Facility AI") due on June 30, 2025. Facility AH carries a margin of 3.0% over EURIBOR with a 0% floor and was issued at 99.75% of par. Facility AI carries a margin of 2.75% over LIBOR with a 0% floor and was issued at 99.75% of par. The net proceeds of these issuances were used in May 2017 to entirely prepay the following credit facilities under our 2015 Amended Senior Credit Facility: (i) Facility AE (€1.6 billion due January 2025, EURIBOR +3.25%, 0% floor), and (ii) Facility AF (USD 1.5 billion due January 2025, LIBOR + 3.00%, 0% floor).
In May 2017, we successfully issued an additional USD 500.0 million Term Loan (“Facility AI2”). Facility AI2 carries the same characteristics as the initial Facility AI which was issued on April 4, 2017. As such, Facility AI2 carries (i) a margin of 2.75% over LIBOR, (ii) a 0% floor and (iii) a maturity of June 30, 2025. Term Loan AI2 was issued at par and has been merged into the initial Facility AI. The net proceeds were used mid-June 2017 to prepay the 6.25% €450.0 million Senior Secured Notes due August 2022. Through the two aforementioned transactions, we succeeded in extending the average tenor of our debt maturities at attractive market conditions, while locking in long-term attractive interest rates.
In June 2017, we drew €210.0 million under our revolving credit facilities to partially fund the acquisition of SFR BeLux of which €120.0 million under our RCF Z and the remaining €90.0 million under our longer-dated RCF AG. In the course of the third quarter, we used our excess cash balance to fully repay the drawn commitments under our RCF AG, while we repaid and cancelled €75.0 million under our short-dated RCF Z. Early October, the last tranche of €45.0 million under RCF Z was repaid and subsequently cancelled. Currently, we face no debt maturities prior to August 2024.
Debt maturity table as of September 30, 2017