Debt

Our total debt, including short-term and long-term debt, consisted of the following (in millions):



	As of December 31,
	2018		2017
Debt:
Short-term debt:
Commercial Paper	$	951	$	1,233
2018 Senior Notes (2.50% senior unsecured notes due October 15, 2018)	—		600
Total short-term debt	951		1,833
Long-term debt:
2020 Senior Notes (2.75% senior unsecured notes due December 1, 2020)	1,246		1,244
2022 Senior Notes (2.35% senior unsecured notes due September 15, 2022)	496		495
2023 Senior Notes (3.45% senior unsecured notes due September 21, 2023)	397		—
2023 Senior Notes (4.00% senior unsecured notes due October 15, 2023)	793		791
2025 Senior Notes (3.75% senior unsecured notes due December 1, 2025)	1,243		1,242
2027 Senior Notes (3.10% senior unsecured notes due September 15, 2027)	496		495
2028 Senior Notes (3.75% senior unsecured notes due September 21, 2028)	591		—
2048 Senior Notes (4.25% senior unsecured notes due September 21, 2048)	1,228		—
Total long-term debt	6,490		4,267
Total debt	$	7,441	$	6,100

Amended Credit Facility

We have a $3.4 billion senior unsecured revolving credit facility pursuant to a credit agreement with Wells Fargo Bank, N.A., as primary administrative agent, issuing lender and swing-line lender, Bank of America, N.A., as syndication agent, backup administrative agent and swing-line lender, and the lenders party thereto. On August 9, 2018, we extended the final maturity date of the credit facility from August 18, 2022 to August 9, 2023, and made certain other changes, herein referred to as the Amended Credit Facility. We incurred debt issuance costs of $2 million relating to the Amended Credit Facility and these costs are included in the accompanying consolidated balance sheet as other non-current assets to be amortized over the life of the facility.

The Amended Credit Facility includes an option for us to propose an increase in the aggregate amount available for borrowing by up to $975 million, subject to the consent of the lenders funding the increase and certain other conditions. No amounts were outstanding under the Amended Credit Facility as of December 31, 2018. As of December 31, 2018, of the $3.4 billion that is currently available, $951 million is required to back-stop the amount outstanding under our Commercial Paper Program and $105 million is required to support certain broker dealer subsidiary commitments. The amount required to backstop the amounts outstanding under the Commercial Paper Program will fluctuate as we increase or decrease our commercial paper borrowings. The remaining $2.3 billion is available for working capital and general corporate purposes including, but not limited to, acting as a back-stop to future increases in the amounts outstanding under the Commercial Paper Program.

We also pay an annual commitment fee for unutilized amounts payable in arrears at a rate that ranges from 0.08% to 0.20% determined based on our long-term debt rating. As of December 31, 2018, the applicable rate was 0.125%. Amounts borrowed under the facility may be prepaid at any time without premium or penalty.

The facility also contains customary representations and warranties, covenants and events of default, including a leverage ratio, limitations on liens on our assets, indebtedness of non-obligor subsidiaries, the sale of all or substantially all of our assets, and other matters.

Commercial Paper Program

We have a U.S. dollar commercial paper program, or the Commercial Paper Program. It is currently backed by the borrowing capacity available under the Amended Credit Facility, as described above. The effective interest rate of commercial paper issuances does not materially differ from short-term interest rates (such as USD LIBOR) which fluctuate due to market conditions and as a result may impact our interest expense.

We repaid a net amount of $283 million of outstanding commercial paper during 2018 using cash flows from operations and cash proceeds received from our 2018 bond issuance. We repaid $409 million of net notes outstanding under the program during 2017 primarily using net cash proceeds received from the sales of Cetip and Trayport. These reductions were partially offset by notes we issued under the program during 2017, the proceeds of which were used to fund acquisitions and investments and repurchase our common stock. We used net proceeds from notes issued under the program during 2016 for the acquisitions of Securities Evaluations and Credit Market Analysis and for general corporate purposes. We repaid a portion of the amounts outstanding under the program during 2018, 2017 and 2016 with cash flows from operations.

Commercial paper notes of $951 million with original maturities ranging from two to 77 days were outstanding as of December 31, 2018 with a weighted average interest rate of 2.48% per annum, and a weighted average maturity of 12 days. Commercial paper notes of $1.2 billion with original maturities ranging from two to 64 days were outstanding as of December 31, 2017, with a weighted average interest rate of 1.49% per annum, and a weighted average maturity of 18 days.

Senior Notes:

•

Newly-Issued Senior Notes: In August 2018, we issued $2.25 billion in new aggregate unsecured fixed-rate senior notes, including $400 million, 3.45% notes due in 2023, or the 2023 Senior Notes, $600 million, 3.75% notes due in 2028, or the 2028 Senior Notes, and $1.25 billion, 4.25% notes due in 2048, or the 2048 Senior Notes, and together with the 2023 Senior Notes and the 2028 Senior Notes, the Newly-Issued Senior Notes. We used the proceeds from the offering for general corporate purposes, including to fund the redemption of the $600 million, 2.50% Senior Notes due October 2018 and to refinance all of our issuances under our Commercial Paper Program that resulted from acquisitions and investments in the last year. We incurred debt issuance costs of $21 million relating to the Newly-Issued Senior Notes that we recorded as a deduction from the carrying amount of the debt and which is being amortized over the respective note lives.

•

2022 and 2027 Senior Notes: In August 2017, we issued $1.0 billion in aggregate senior unsecured fixed-rate notes, including $500 million, 2.35% notes due September 2022, or the 2022 Senior Notes, and $500 million, 3.10% notes due September 2027, or the 2027 Senior Notes. We used the majority of the proceeds of the offering to fund the redemption in September 2017 of $850 million, 2.00% senior unsecured fixed-rate NYSE Notes prior to the October 2017 maturity date. We incurred debt issuance costs of $8 million relating to the 2022 Senior Notes and the 2027 Senior Notes that we recorded as a deduction from the carrying amount of the debt and which is being amortized over the respective note lives.

•

2020 and 2025 Senior Notes: In November 2015, we issued $2.5 billion in aggregate senior unsecured fixed-rate notes, including $1.25 billion, 2.75% notes due November 2020, or the 2020 Senior Notes, and $1.25 billion, 3.75% notes due November 2025, or the 2025 Senior Notes. We used the proceeds from the offering, together with $1.6 billion of borrowings under our Commercial Paper Program, to finance the cash portion of the purchase price of Interactive Data.


•	October 2023 Senior Notes: In October 2013, we issued $800 million, 4.00% senior unsecured fixed-rate notes due October 2023, or the October 2023 Senior Notes. We used the net proceeds from the October 2023 Senior Notes to finance a portion of the purchase price of the acquisition of NYSE.

The Newly-Issued Senior Notes, the 2022 Senior Notes, the 2027 Senior Notes, the 2020 Senior Notes, the 2025 Senior Notes, the 2023 Senior Notes and the October 2023 Senior Notes all contain affirmative and negative covenants, including, but not limited to, certain redemption rights, limitations on liens and indebtedness and limitations on certain mergers, sales, dispositions and lease-back transactions.

Debt Repayment Schedule

As of December 31, 2018, the outstanding debt repayment schedule is as follows (in millions):



2019	$	953
2020	1,250
2021	—
2022	500
2023	1,200
Thereafter	3,600
Principal amounts repayable	7,503
Debt issuance costs	(41		)
Unamortized balance discounts on bonds, net	(21		)
Total debt outstanding	$	7,441