Debt

Our total debt, including short-term and long-term debt, consisted of the following as of June 30, 2016 and December 31, 2015 (in millions):



	As of June 30, 2016		As of December 31, 2015
Debt:
Commercial Paper	$	1,811	$	2,591
Short-term debt	1,811		2,591
NYSE USD Notes (2.00% senior unsecured notes due October 5, 2017)	852		852
2018 Senior Notes (2.50% senior unsecured notes due October 15, 2018)	597		597
2020 Senior Notes (2.75% senior unsecured notes due December 1, 2020)	1,240		1,239
2023 Senior Notes (4.00% senior unsecured notes due October 15, 2023)	789		789
2025 Senior Notes (3.75% senior unsecured notes due December 1, 2025)	1,241		1,240
Long-term debt	4,719		4,717
Total debt	$	6,530	$	7,308

Credit Facility

We have entered into a $3.0 billion senior unsecured revolving credit facility, or the Credit Facility, with a maturity date of November 13, 2020. The Credit Facility includes an option for us to propose an increase in the aggregate amount available for borrowing by up to $1.0 billion, subject to the consent of the lenders funding the increase and certain other conditions. On November 13, 2015, we utilized this option to increase the amount of the Credit Facility to $3.4 billion. The commitments under the Credit Facility will automatically reduce to $2.95 billion on April 3, 2019. No amounts were outstanding under the Credit Facility as of June 30, 2016.

Of the $3.4 billion that is currently available for borrowing under the Credit Facility, $1.8 billion is required to back-stop the amount outstanding under our Commercial Paper Program as of June 30, 2016. The amount required to back-stop the amounts outstanding under the Commercial Paper Program will fluctuate as we increase or decrease our commercial paper borrowings. The remaining $1.6 billion as of June 30, 2016 is available to us to use for working capital and general corporate purposes including, but not limited to, acting as a back-stop to the amounts outstanding under the Commercial Paper Program.

364 Day Facility

In November 2015, we entered into a $500 million 364 day senior unsecured revolving credit facility, or the 364 Day Facility. The amounts available under the 364 Day Facility are available for use by us for working capital and general corporate purposes, but specifically excluding any use to back-stop amounts issued under the Commercial Paper Program. The commitments under the 364 Day Credit Facility were reduced to $375 million on May 13, 2016 and will be automatically reduced to $250 million on August 13, 2016. No amounts were outstanding under the 364 Day Facility as of June 30, 2016.

Commercial Paper Program

We have entered into a U.S. dollar commercial paper program, or the Commercial Paper Program. Our Commercial Paper Program is currently backed by the borrowing capacity available under the Credit Facility, equal to the amount of the commercial paper that is issued and outstanding at any given point in time. The effective interest rate of commercial paper issuances does not materially differ from short term interest rates (such as USD LIBOR). The fluctuation of these rates due to market conditions may impact our interest expense.

Commercial paper notes of $1.8 billion with original maturities ranging from 1 to 89 days were outstanding as of June 30, 2016 under our Commercial Paper Program. As of June 30, 2016, the weighted average interest rate on the $1.8 billion outstanding under our Commercial Paper Program was 0.54% per annum, with a weighted average maturity of 18 days. We repaid $781 million of the amounts outstanding under the Commercial Paper Program during the six months ended June 30, 2016 using cash flows from operations and a portion of our unrestricted cash balances.

Senior Notes

On November 24, 2015, we issued $2.5 billion in aggregate senior notes, including $1.25 billion principal amount of 2.75% senior unsecured fixed rate notes due November 2020, or the 2020 Senior Notes, and $1.25 billion principal amount of 3.75% senior unsecured fixed rate notes due November 2025, or the 2025 Senior Notes. We used the net proceeds from the 2020 Senior Notes and 2025 Senior Notes offering, together with $1.6 billion of borrowings under our Commercial Paper Program, to finance the $4.1 billion cash portion of the purchase price of the acquisition of Interactive Data (Note 3).

In October 2013, we issued $600 million principal amount of 2.50% senior unsecured fixed rate notes due October 2018, or the 2018 Senior Notes, and $800 million principal amount of 4.00% senior unsecured fixed rate notes due October 2023, or the 2023 Senior Notes.

NYSE Notes

In connection with our acquisition on November 13, 2013 of NYSE Euronext, which we refer to as NYSE following the initial public offering and sale of Euronext in 2014, we assumed NYSE's outstanding debt instruments, which included $850 million of 2.00% senior unsecured fixed rate notes due in October 2017, or the NYSE USD Notes, and €920 million ($1.1 billion) of 5.375% senior unsecured fixed rate notes that were due in June 2015, or the NYSE EUR Notes, and together with the NYSE USD Notes, the NYSE Notes. On June 30, 2015, we repaid the NYSE EUR Notes using cash that had been set aside in July 2014 from the proceeds of the sale of Euronext.

During the six months and three months ended June 30, 2015, the amortization of the increase in the fair value of the NYSE Notes that was recorded in connection with the NYSE acquisition purchase accounting was $23 million and $11 million, respectively. No significant amortization expenses were recorded after the repayment of the NYSE EUR Notes.