In December 2016, we entered into an amended and restated revolving credit agreement with a syndicate of banks providing for a multi-year $1.0 billion senior unsecured revolving credit facility (the credit facility). In December 2018, the maturity for the amended and restated revolving credit agreement was extended through December 2023. Subject to certain conditions, we have the right to increase the credit facility to up to $1.5 billion. The credit facility contains a financial covenant requiring us to not exceed a maximum total leverage ratio (the ratio of consolidated net debt as of the end of the period to consolidated Earnings Before Interest, Income Taxes, Depreciation and Amortization (EBITDA) for such period) of 3.50:1. Upon entering into a material acquisition, the maximum total leverage ratio increases to 4.00:1, and extends until the fourth full consecutive fiscal quarter ended immediately following the consummation of a material acquisition.

The credit facility also contains a financial covenant requiring that we maintain a minimum interest coverage ratio (the ratio of EBITDA at the end of the period to interest expense for such period) of 3.50:1. In addition, the credit facility contains other customary covenants.

We have additional lines of credit and other credit arrangements with a group of banks and other financial intermediaries for general corporate purposes. We maintain cash and cash equivalent balances in excess of our outstanding short-term borrowings. As of March 31, 2020, we had access to $75 million of lines of credit which expire at various times through 2020 and are generally renewed annually. There were no borrowings outstanding related to these facilities as of March 31, 2020 and December 31, 2019.

On August 20, 2018, we issued $1.5 billion aggregate principal amount of our senior notes (2018 senior notes), with an original issue discount of $4 million. On September 12, 2017, we issued $1.25 billion aggregate principal amount of our senior notes (2017 senior notes), with an original issue discount of $7 million. On November 13, 2015, we issued $1.25 billion aggregate principal amount of our senior notes (2015 senior notes), with an original issue discount of $2 million. On January 28, 2013, we issued $3.65 billion aggregate principal amount of our senior notes (2013 senior notes) in a private placement, with an original issue discount of $10 million.

The 2013, 2015, 2017 and 2018 senior notes are governed by an indenture and supplemental indenture (collectively, the indenture) between us and Deutsche Bank Trust Company Americas, as trustee. The indenture contains certain covenants, including limitations on our and certain of our subsidiaries' ability to incur liens or engage in sale-leaseback transactions. The indenture also contains restrictions on our ability to consolidate, merge or sell substantially all of our assets. In addition, the indenture contains other customary terms, including certain events of default, upon the occurrence of which the 2013, 2015, 2017 and 2018 senior notes may be declared immediately due and payable.

Pursuant to the indenture, we are able to redeem the 2013, 2015 and 2017 senior notes and the 2018 fixed rate senior notes or any series, in whole or in part, at any time by paying a “make whole” premium, plus accrued and unpaid interest to, but excluding, the date of redemption. The 2018 floating rate senior notes are not redeemable at our option prior to their maturity date. Pursuant to our tax matters agreement with Pfizer, we will not be permitted to redeem the 2013 senior notes due 2023 pursuant to this optional redemption provision, except under limited circumstances. Upon the occurrence of a change of control of us and a downgrade of the 2013, 2015, 2017 and 2018 senior notes below an investment grade rating by each of Moody's Investors Service, Inc. and Standard & Poor's Ratings Services, we are, in certain circumstances, required to make an offer to repurchase all of the outstanding 2013, 2015, 2017 and 2018 senior notes at a price equal to 101% of the aggregate principal amount of the 2013, 2015, 2017 and 2018 senior notes together with accrued and unpaid interest to, but excluding, the date of repurchase.


	March 31,		December 31,
(MILLIONS OF DOLLARS)	2020		2019
3.450% 2015 senior notes due 2020	$	500	$	500
2018 floating rate (three-month USD LIBOR plus 0.44%) senior notes due 2021	300		300
3.250% 2018 senior notes due 2021	300		300
3.250% 2013 senior notes due 2023	1,350		1,350
4.500% 2015 senior notes due 2025	750		750
3.000% 2017 senior notes due 2027	750		750
3.900% 2018 senior notes due 2028	500		500
4.700% 2013 senior notes due 2043	1,150		1,150
3.950% 2017 senior notes due 2047	500		500
4.450% 2018 senior notes due 2048	400		400
	6,500		6,500
Unamortized debt discount / debt issuance costs	(49)		(51)
Less current portion of long-term debt	500		500
Cumulative fair value adjustment for interest rate swap contracts	12		(2)
Long-term debt, net of discount and issuance costs	$	5,963	$	5,947

The fair value of our long-term debt was $6,384 million and $6,587 million as of March 31, 2020, and December 31, 2019, respectively, and has been determined using a third-party matrix-pricing model that uses significant inputs derived from, or corroborated by, observable market data and Zoetis’ credit rating (Level 2 inputs).

Interest expense, net of capitalized interest, was $53 million and $56 million for the three months ended March 31, 2020 and March 31, 2019, respectively. Capitalized interest expense was $4 million and $3 million for the three months ended March 31, 2020 and March 31, 2019, respectively.

A significant portion of our revenue, earnings and net investment in foreign affiliates is exposed to changes in foreign exchange rates. We seek to manage our foreign exchange risk, in part, through operational means, including managing same-currency revenue in relation to same-currency costs and same-currency assets in relation to same-currency liabilities. Depending on market conditions, foreign exchange risk is also managed through the use of various derivative financial instruments. These derivative financial instruments serve to manage the exposure of our net investment in certain foreign operations to changes in foreign exchange rates and protect net income against the impact of translation into U.S. dollars of certain foreign exchange-denominated transactions.

All derivative financial instruments used to manage foreign currency risk are measured at fair value and are reported as assets or liabilities on the condensed consolidated balance sheet. The derivative financial instruments primarily offset exposures in the Australian dollar, British pound, Canadian dollar, Chinese yuan, euro, and Japanese yen. Changes in fair value are reported in earnings or in Accumulated other comprehensive income/(loss), depending on the nature and purpose of the financial instrument, as follows:

•For foreign exchange contracts not designated as hedging instruments, we recognize the gains and losses on forward-exchange contracts that are used to offset the same foreign currency assets or liabilities immediately into earnings along with the earnings impact of the items they generally offset. These contracts essentially take the opposite currency position of that reflected in the month-end balance sheet to counterbalance the effect of any currency movement. The vast majority of the foreign exchange derivative financial instruments mature within 60 days and all mature within three years.

•For cross-currency interest rate swaps, which are designated as a hedge against our net investment in foreign operations, changes in the fair value are recorded as a component of cumulative translation adjustment within Accumulated other comprehensive income/(loss) and reclassified into earnings when the foreign investment is sold or substantially liquidated. Gains and losses excluded from the assessment of hedge effectiveness are recognized in earnings (Interest expense—net of capitalized interest). The cash flows from these contracts are reflected within the investing section of our Condensed Consolidated Statement of Cash Flows. The cross-currency interest rate swap contracts have varying maturities of up to five years.

•In anticipation of issuing fixed-rate debt, we may use forward-starting interest rate swaps that are designated as cash flow hedges to hedge against changes in interest rates that could impact expected future issuances of debt. Unrealized gains or losses on the forward-starting interest rate swaps are reported in Accumulated other comprehensive income/(loss) and are recognized in earnings over the life of the future fixed-rate notes. When the company discontinues hedge accounting because it is no longer probable that an anticipated transaction will occur within the originally expected period of execution, or within an additional two-month period thereafter, changes to fair value accumulated in other comprehensive income are recognized immediately in earnings. For the three months ended March 31, 2020, we entered into forward-starting interest rate swaps, having an effective date and mandatory termination date in March 2023, to hedge against interest rate exposure related principally to the anticipated future issuance of fixed-rate debt to be used primarily to refinance our 3.250% 2013 senior notes due 2023.

•We may use fixed-to-floating interest rate swaps that are designated as fair value hedges to hedge against changes in the fair value of certain fixed-rate debt attributable to changes in the benchmark LIBOR rate. These derivative instruments effectively convert a portion of the company’s long-term debt from fixed rate to floating rate debt based on three-month LIBOR plus a spread. Gains or losses on the fixed-to-floating interest rate swaps due to changes in LIBOR are recorded in Interest expense, net of capitalized interest. Changes in the fair value of the fixed-to-floating interest rate swaps are offset by changes in the fair value of the underlying fixed rate debt. As of March 31, 2020, we had an outstanding fixed-to-floating interest rate swap which corresponds to a portion of the 3.900% 2018 senior notes due 2028. The amounts recorded during the three months ended March 31, 2020 for changes in the fair value of this hedge are not material to our consolidated financial statements.


	Notional
	March 31,		December 31,
(MILLIONS)	2020		2019
Foreign currency forward-exchange contracts	$	1,272	$	1,364

Cross-currency interest rate swap contracts (in foreign currency):
Euro	650		650
Swiss franc	25		25
Danish krone	600		600

Forward-starting interest rate swaps	$	450	$	250

Fixed-to-floating interest rate swap contracts	$	150	$	150


		Fair Value of Derivatives
		March 31,		December 31,
(MILLIONS OF DOLLARS)	Balance Sheet Location	2020		2019
Derivatives Not Designated as Hedging Instruments
Foreign currency forward-exchange contracts	Other current assets	$	19	$	7
Foreign currency forward-exchange contracts	Other current liabilities	(5)		(5)
Total derivatives not designated as hedging instruments		$	14	$	2

Derivatives Designated as Hedging Instruments:
Forward-starting interest rate swap contracts	Other noncurrent assets	$	—	$	5
Forward-starting interest rate swap contracts	Other noncurrent liabilities	(32)		(1)
Cross-currency interest rate swap contracts	Other current assets	7		4
Cross-currency interest rate swap contracts	Other noncurrent assets	36		20
Cross-currency interest rate swap contracts	Other current liabilities	(3)		(3)
Fixed-to-floating interest rate swap contracts	Other noncurrent assets	12		(2)
Total derivatives designated as hedging instruments		20		23
Total derivatives		$	34	$	25

The company’s cross-currency interest rate swaps are subject to master netting arrangements to mitigate credit risk by permitting net settlement of transactions with the same counterparty. We may also enter into collateral security arrangements with certain of our counterparties to exchange cash collateral when the net fair value of certain derivative instruments fluctuates from contractually established thresholds. At March 31, 2020, there was $28 million of collateral received related to the long-term cross-currency interest rate swaps.

The net amount of deferred gains related to derivative instruments designated as cash flow hedges that is expected to be reclassified from Accumulated other comprehensive income/(loss) into earnings over the next 12 months is insignificant.