We had total debt outstanding of $9.143 billion as of December 31, 2020 and $10.008 billion as of December 31, 2019, with current maturities of $13 million as of December 31, 2020 and $1.416 billion as of December 31, 2019. The debt maturity schedule for our long-term debt obligations is presented below:


	Issuance Date	Maturity Date	As of December 31,				Coupon Rate(1)
(in millions, except interest rates)			2020		2019
May 2022 Notes	May 2015	May 2022	$	250	$	500	3.375%
October 2023 Notes	August 2013	October 2023	244		244		4.125%
March 2024 Notes	February 2019	March 2024	850		850		3.450%
May 2025 Notes	May 2015	May 2025	523		523		3.850%
June 2025 Notes	May 2020	June 2025	500		—		1.900%
March 2026 Notes	February 2019	March 2026	850		850		3.750%
December 2027 Notes	November 2019	December 2027	1,105		1,011		0.625%
March 2028 Notes	February 2018	March 2028	434		434		4.000%
March 2029 Notes	February 2019	March 2029	850		850		4.000%
June 2030 Notes	May 2020	June 2030	1,200		—		2.650%
November 2035 Notes(2)	November 2005	November 2035	350		350		7.000%
March 2039 Notes	February 2019	March 2039	750		750		4.550%
January 2040 Notes	December 2009	January 2040	300		300		7.375%
March 2049 Notes	February 2019	March 2049	1,000		1,000		4.700%
August 2022 Term Loan	August 2019	August 2022	—		1,000
Unamortized Debt Issuance Discount and Deferred Financing Costs		2022 - 2049	(88)		(83)
Unamortized Gain on Fair Value Hedges		2023	5		7
Finance Lease Obligation		Various	7		6
Long-term debt			$	9,130	$	8,592

(2) Corporate credit rating improvements may result in a decrease in the adjusted interest rate on our November 2035 Notes to the extent that our lowest credit rating is above BBB- or Baa3. The interest rates on our November 2035 Notes will be permanently reinstated to the issuance rate if the lowest credit ratings assigned to these senior notes is either A- or A3 or higher.

We maintain a $2.750 billion revolving credit facility (Revolving Credit Facility) with a global syndicate of commercial banks that matures on December 19, 2023 with one-year extension options, subject to certain conditions. This facility provides backing for our commercial paper program, and outstanding commercial paper directly reduces borrowing capacity under the Revolving Credit Facility. The credit agreement requires that we comply with certain covenants, including a financial covenant described within Financial Covenant below. In the first quarter of 2020, we refinanced $1.360 billion of commercial paper using proceeds from the Revolving Credit Facility. In April 2020, we entered into the April 2021 Term Loan, described below, and used the proceeds to repay a portion of the amounts outstanding under the Revolving Credit Facility. On May 28, 2020, we entered into an amendment of the credit agreement to permit payment of regularly scheduled quarterly cash dividends and other limited cash payments on our issued 5.50% Mandatory Convertible Preferred Stock, Series A (MCPS) and other capital stock issued by us, which is or becomes mandatorily convertible into or exchangeable for shares of our common stock. In May 2020, we completed our senior notes offering described below and used a portion of the proceeds to repay $450 million outstanding under the Revolving Credit Facility. There were no amounts outstanding under the Revolving Credit Facility as of December 31, 2020 or December 31, 2019.

On April 21, 2020, in a proactive step to offset the potential impact of the COVID-19 pandemic on our short-term liquidity, we entered into a $1.250 billion term loan credit agreement scheduled to mature on April 20, 2021 (April 2021 Term Loan). We used proceeds from the April 2021 Term Loan to repay a portion of the amounts outstanding under the Revolving Credit Facility and the remaining amount under the December 2020 Term Loan described below. In May 2020, as described in further detail below, we used a portion of the proceeds from the May 2020 senior notes offering to prepay $500 million of amounts outstanding under the April 2021 Term Loan, and a portion of the combined net proceeds from our MCPS and common stock offerings to repay in full the remaining $750 million outstanding under the April 2021 Term Loan and to pay related fees, expenses and premiums, after which it was terminated.

On February 27, 2020, we entered into a $1.000 billion term loan credit agreement scheduled to mature on February 25, 2021 (February 2021 Term Loan). We used the proceeds from the February 2021 Term Loan to repay the remaining amounts outstanding on the Three-Year Delayed Draw Term Loan, described below. On May 28, 2020, we entered into an amendment of the credit agreement to permit payment of regularly scheduled quarterly cash dividends and other limited cash payments on our issued MCPS and other capital stock issued by us, which is or becomes mandatorily convertible into or exchangeable for shares of our common stock. The February 2021 Term Loan bears interest at an annual rate of LIBOR plus a margin of 0.85%. The credit agreement is subject to a financial covenant described below under Financial Covenant, and also contains customary events of default, which may result in the acceleration of any outstanding commitments. We used a portion of the proceeds from our May 2020 senior notes offering, described below, to prepay $750 million of amounts outstanding under the February 2021 Term Loan in the second quarter of 2020. In the third quarter of 2020, we prepaid the remaining $250 million and terminated the February 2021 Term Loan.

On December 5, 2019, we entered into a $700 million term loan credit agreement, which was scheduled to mature on December 3, 2020 (December 2020 Term Loan). As of December 31, 2019, we had $700 million outstanding under the December 2020 Term Loan, and we used the proceeds to repay a portion of the Two-Year Delayed Draw Term Loan, described below. In January 2020, we repaid $300 million of the outstanding balance of the December 2020 Term Loan with proceeds from our commercial paper program. In April 2020, we used the proceeds from the April 2021 Term Loan to repay the remaining amounts outstanding under the December 2020 Term Loan and terminated the December 2020 Term Loan.

On December 19, 2018, we entered into a $2.000 billion senior unsecured delayed-draw term loan facility consisting of a $1.000 billion two-year delayed draw term loan credit facility maturing in two years from the date of the closing of the acquisition of BTG (Two-Year Delayed Draw Term Loan) and a $1.000 billion three-year delayed draw term loan credit facility maturing in three years from the date of the closing of the acquisition of BTG (Three-Year Delayed Draw Term Loan). On August 19, 2019, for the purpose of funding the acquisition of BTG, we borrowed $1.000 billion under the Two-Year Delayed Draw Term Loan and $1.000 billion under the Three-Year Delayed Draw Term Loan. In 2019, we repaid all amounts outstanding on the Two-Year Delayed Draw Term Loan with proceeds from the sale of the Zytiga-related royalty interests, the December 2020 Term Loan and commercial paper and terminated the facility. As of December 31, 2019, we had $1.000 billion outstanding under the Three-Year Delayed Draw Term Loan (also referred to as the "August 2022 Term Loan" in the debt maturity schedule above). In the first quarter of 2020, we repaid all amounts outstanding on the Three-Year Delayed Draw Term Loan with proceeds from the February 2021 Term Loan and terminated the facility. As of December 31, 2020, we had no amounts outstanding under the Two and Three-Year Delayed Draw Term Loans and the facilities were terminated.

On April 21, 2020, we entered into an agreement with our banking syndicates to amend the financial covenant requirement for all of our outstanding credit arrangements as follows: (i) established a deemed Consolidated EBITDA of $671 million for the second, third and fourth quarters of 2020, reflecting average quarterly Consolidated EBITDA, as defined in the credit agreements, for 2018 and 2019; and (ii) maintain the maximum permitted leverage ratio of 4.75 times through the remainder of 2020, with a step-down for each succeeding fiscal quarter end to 4.50 times, 4.25 times, 4.00 times and ultimately 3.75 times for the fourth quarter of 2021 and through the remaining term of the facility. In addition, pursuant to the April 21, 2020

The financial covenant requirement provides for an exclusion from the calculation of consolidated EBITDA, as defined by the agreements, through maturity, of any non-cash charges and up to $500 million in restructuring and restructuring-related net charges related to our current or future restructuring plans. As of December 31, 2020, we had $101 million of the restructuring net charges exclusion remaining. In addition, any cash litigation payments (net of any cash litigation receipts), as defined by the agreements, are excluded from the calculation of consolidated EBITDA, as defined by the agreements, provided that the sum of any excluded net cash litigation payments do not exceed $2.624 billion in the aggregate. As of December 31, 2020, we had $926 million of the litigation exclusion remaining.

Any inability to maintain compliance with this amended covenant could require us to seek to further renegotiate the terms of our Revolving Credit Facility or seek waivers from compliance with this covenant, both of which could result in additional borrowing costs. Further, there can be no assurance that our lenders would agree to such new terms or grant such waivers on terms acceptable to us. In this case, all Revolving Credit Facility commitments would terminate, and any amounts borrowed under the facility would become immediately due and payable. Furthermore, any termination of our Revolving Credit Facility may negatively impact the credit ratings assigned to our commercial paper program which may impact our ability to refinance any then outstanding commercial paper as it becomes due and payable.

Our commercial paper program is backed by the Revolving Credit Facility, as discussed above. Outstanding commercial paper directly reduces borrowing capacity under the Revolving Credit Facility. In the first quarter of 2020, we refinanced $1.360 billion of commercial paper using proceeds from the Revolving Credit Facility and did not have any commercial paper outstanding as of December 31, 2020.

In May 2020, we completed an offering of $1.700 billion in aggregate principal amount of senior notes comprised of $500 million of 1.900% senior notes due June 2025 and $1.200 billion of 2.650% senior notes due June 2030. We used the net proceeds from the offering to refinance $450 million of amounts outstanding under the Revolving Credit Facility, prepay $750 million of amounts outstanding under the $1.000 billion February 2021 Term Loan, prepay $500 million of amounts outstanding under the $1.250 billion April 2021 Term Loan and pay related fees, expenses and premiums.

In November 2019, we completed an offering of €900 million (approximately $1.000 billion) in aggregate principal amount of 0.625% senior notes due in 2027 (December 2027 Notes). The euro-denominated debt principal is a nonderivative instrument designated as a net investment hedge of our net investments in certain of our euro functional entities. Refer to Note E – Hedging Activities and Fair Value Measurements for additional information. We used a portion of the net proceeds from our November 2019 senior notes offering to repay certain outstanding principal amounts of our senior notes including $206 million of our $450 million 4.125% senior notes due 2023, $566 million of our $1.000 billion 4.000% senior notes due 2028 and $227 million of our $750 million 3.850% senior notes due 2025 and pay accrued and unpaid interest, premiums, fees and expenses in

In February 2019, we completed an offering of $4.300 billion in aggregate principal amount of senior notes comprised of $850 million of 3.450% senior notes due March 2024, $850 million of 3.750% senior notes due March 2026, $850 million of 4.000% senior notes due March 2029, $750 million of 4.550% senior notes due March 2039 and $1.000 billion of 4.700% senior notes due March 2049. We used a portion of the net proceeds from the offering to repay the $850 million plus accrued interest and premium of our 6.000% senior notes due in January 2020, the $600 million plus accrued interest and premium of our 2.850% senior notes due in May 2020 and the $1.000 billion plus accrued interest of our August 2019 Term Loan. In 2019, the remaining proceeds were used to finance a portion of our acquisition of BTG.

Our senior notes were issued in public offerings, are redeemable prior to maturity and are not subject to sinking fund requirements. Our senior notes are unsecured, unsubordinated obligations and rank on parity with each other. These notes are effectively junior to liabilities of our subsidiaries (see Other Arrangements below).

Our $8.855 billion of senior notes issued in 2009, 2013, 2015, 2018, 2019 and 2020 contain a change-in-control provision, which provides that each holder of the senior notes may require us to repurchase all or a portion of the notes at a price equal to 101 percent of the aggregate repurchased principal, plus accrued and unpaid interest, if a rating event, as defined in the indenture, occurs as a result of a change-in-control, as defined in the indenture. Any other credit rating changes may impact our borrowing cost, but do not require us to repay any borrowings.

We have accounts receivable factoring programs in certain European countries and with commercial banks in China and Japan which include promissory notes discounting programs. We account for our factoring programs as sales under FASB ASC Topic 860, Transfers and Servicing. We have no retained interest in the transferred receivables, other than collection and administration, and once sold, the accounts receivable are no longer available to satisfy creditors in the event of bankruptcy. Amounts de-recognized for accounts and notes receivable, which are excluded from Trade accounts receivable, net in our accompanying consolidated balance sheets, are aggregated by contract denominated currency below (in millions):

We had outstanding letters of credit of $124 million as of December 31, 2020 and $105 million as of December 31, 2019, which consisted primarily of bank guarantees and collateral for workers' compensation insurance arrangements. As of December 31, 2020 and December 31, 2019, none of the beneficiaries had drawn upon the letters of credit or guarantees, accordingly, we have not recognized a related liability for our outstanding letters of credit in our consolidated balance sheets as of December 31, 2020 and December 31, 2019.