LONG-TERM DEBT

12 Months Ended

Dec. 31, 2019

We provide detail on our long-term debt balances, net of discounts, premiums, and debt issuance costs, in the following table at year-end 2019 and 2018:



($ in millions)	At Year-End 2019			At Year-End 2018
Senior Notes:
Series K Notes, interest rate of 3.0%, face amount of $600, matured March 1, 2019 (effective interest rate of 4.4%)	$	—		$	600
Series L Notes, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 (effective interest rate of 3.4%)	349			349
Series M Notes, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 (effective interest rate of 3.6%)	349			349
Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 (effective interest rate of 3.4%)	398			397
Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 (effective interest rate of 3.1%)	449			448
Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%)	346			345
Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 (effective interest rate of 2.5%)	747			745
Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%)	744			743
Series T Notes, interest rate of 7.2%, face amount of $181, matured December 1, 2019 (effective interest rate of 2.3%)	—			188
Series U Notes, interest rate of 3.1%, face amount of $291, maturing February 15, 2023 (effective interest rate of 3.1%)	291			291
Series V Notes, interest rate of 3.8%, face amount of $318, maturing March 15, 2025 (effective interest rate of 2.8%)	332			335
Series W Notes, interest rate of 4.5%, face amount of $278, maturing October 1, 2034 (effective interest rate of 4.1%)	291			292
Series X Notes, interest rate of 4.0%, face amount of $450, maturing April 15, 2028 (effective interest rate of 4.2%)	444			443
Series Y Notes, floating rate, face amount of $550, maturing December 1, 2020 (effective interest rate of 2.5% at December 31, 2019)	549			547
Series Z Notes, interest rate of 4.2%, face amount of $350, maturing December 1, 2023 (effective interest rate of 4.4%)	347			347
Series AA Notes, interest rate of 4.7%, face amount of $300, maturing December 1, 2028 (effective interest rate of 4.8%)	297			297
Series BB Notes, floating rate, face amount of $300, maturing March 8, 2021 (effective interest rate of 2.5% at December 31, 2019)	299			—
Series CC Notes, interest rate of 3.6%, face amount of $550, maturing April 15, 2024 (effective interest rate of 3.9%)	564			—
Series DD Notes, interest rate of 2.1%, face amount of $550, maturing October 3, 2022 (effective interest rate of 2.4%)	543			—

Commercial paper	3,197			2,245
Credit Facility	—			—
Finance lease obligations	157			163
Other	247			223
	$	10,940		$	9,347
Less: Current portion of long-term debt	(977		)	(833		)
	$	9,963		$	8,514

All our long-term debt is recourse to us but unsecured, other than debt assumed in our acquisition of Elegant which we paid off in January 2020. All the Senior Notes shown in the table above are our unsecured and unsubordinated obligations, which rank equally with our other Senior Notes and all other unsecured and unsubordinated indebtedness that we have issued or will issue from time to time, and are governed by the terms of an indenture, dated as of November 16, 1998, between us and The Bank of New York Mellon (formerly The Bank of New York), as trustee. With the exception of the floating rate Series Y

Notes and Series BB Notes, we may redeem some or all of each series of the Senior Notes before maturity under the terms provided in the applicable form of Senior Note.

In the 2019 fourth quarter, we issued $550 million aggregate principal amount of 2.125 percent Series DD Notes due October 3, 2022 (the “Series DD Notes”). We will pay interest on the Series DD Notes in April and October of each year, commencing in April 2020. In connection with the offering, we entered into interest rate swap agreements, which have the economic effect of converting the Series DD Notes into floating rate debt with a variable interest rate of one-month LIBOR (the London Interbank Offered Rate) plus 0.754 percent. We received net proceeds of approximately $545 million from the offering of the Series DD Notes, after deducting the underwriting discount and estimated expenses, which were made available for general corporate purposes, which may include working capital, capital expenditures, acquisitions, stock repurchases, or repayment of outstanding commercial paper or other borrowings.

In the 2019 second quarter, we amended and restated our multicurrency revolving credit agreement (the “Credit Facility”) to extend the maturity date of the Credit Facility and increase the aggregate amount of available borrowings to up to $4.5 billion. The available borrowings support our commercial paper program and general corporate needs. Borrowings under the Credit Facility generally bear interest at LIBOR plus a spread, based on our public debt rating. We also pay quarterly fees on the Credit Facility at a rate based on our public debt rating. While any outstanding commercial paper borrowings and/or borrowings under our Credit Facility generally have short-term maturities, we classify the outstanding borrowings as long-term based on our ability and intent to refinance the outstanding borrowings on a long-term basis. The Credit Facility expires on June 28, 2024.

In the 2019 first quarter, we issued $300 million aggregate principal amount of LIBOR plus 0.650 percent Series BB Notes due March 8, 2021 (the “Series BB Notes”) and $550 million aggregate principal amount of 3.600 percent Series CC Notes due April 15, 2024 (the “Series CC Notes”). We pay interest on the Series BB Notes in March, June, September, and December of each year, which commenced in June 2019, and we pay interest on the Series CC Notes in April and October of each year, which commenced in October 2019. In connection with the offering, we entered into interest rate swap agreements, which have the economic effect of converting the Series CC Notes into floating rate debt with a variable interest rate of one-month LIBOR plus 1.1205 percent. We received net proceeds of approximately $841 million from the offering of the Series BB Notes and Series CC Notes, after deducting the underwriting discount and estimated expenses, which were made available for general corporate purposes, which may include working capital, capital expenditures, acquisitions, stock repurchases, or repayment of outstanding commercial paper or other borrowings.

The following table presents future principal payments, net of discounts, premiums, and debt issuance costs, for our debt at year-end 2019:



Debt Principal Payments ($ in millions)	Amount
2020	$	977
2021	1,164
2022	1,657
2023	694
2024	3,783
Thereafter	2,665
Balance at year-end 2019	$	10,940

We paid cash for interest, net of amounts capitalized, of $348 million in 2019, $290 million in 2018, and $234 million in 2017.