Derivative Instruments

From time to time, we may enter into derivative financial instrument transactions to manage or reduce our market risk. We manage our debt portfolio to achieve an overall desired position of fixed and floating rates, and we may employ interest rate swaps as a tool to achieve that goal. We enter into foreign currency forward contracts and cross-currency swap contracts to economically hedge our exposure to fluctuations in various foreign currencies. The major risks from interest rate derivatives include changes in the interest rates affecting the fair value of such instruments, potential increases in interest expense due to market increases in floating interest rates, changes in foreign exchange rates and the creditworthiness of the counterparties in such transactions.

We monitor the creditworthiness of our counterparties, which are multinational commercial banks. The fair values of all our outstanding derivative instruments are determined using a model with Level 2 inputs including quoted market prices for contracts with similar terms and maturity dates.

Warrant

During the fourth quarter of 2016, in conjunction with the issuance of 84.5 million ordinary shares, we issued a warrant that gives the holder the option to acquire an additional 84.5 million ordinary shares. The exercise price on the warrant is $6.43 per share and is exercisable any time prior to May 21, 2019. The warrant is classified as a liability and carried at fair value with changes in its fair value reported through earnings. The warrant participates in dividends and other distributions as if the shares subject to the warrants were outstanding. In addition, the warrant permits early redemption due to a change in control.

The warrant fair value is considered a Level 2 valuation and is estimated using the Black Scholes valuation model. Inputs to the model include Weatherford’s share price, volatility of our share price, and the risk free interest rate. The fair value of the warrant was $3 million on September 30, 2018 and $70 million on December 31, 2017, generating unrealized gains of $11 million and $67 million for the third quarter and the first nine months of 2018, respectively. In 2017, we recognized unrealized loss of $7 million and gain of $58 million for the third quarter and the first nine months of 2017, respectively. The change in fair value of the warrant during the first nine months of 2018 was primarily driven by eliminating the warrant share value associated with any future equity issuance and a decrease in Weatherford’s stock price.

Fair Value Hedges

We may use interest rate swaps to help mitigate exposures related to changes in the fair values of the fixed-rate debt. The interest rate swap is recorded at fair value with changes in fair value recorded in earnings. The carrying value of fixed-rate debt is also adjusted for changes in interest rates, with the changes in value recorded in earnings. After termination of the hedge, any discount or premium on the fixed-rate debt is amortized to interest expense over the remaining term of the debt. As of September 30, 2018, we did not have any fair value hedges designated.

We had net unamortized premiums on fixed-rate debt of nil and $4 million on September 30, 2018 and December 31, 2017, respectively, associated with fair value hedge terminations. These premiums were being amortized over the remaining term of the originally hedged debt as a reduction in interest expense included in “Interest Expense, Net” on the accompanying Condensed Consolidated Statements of Operations and were fully amortized upon completion of the tender offer in April 2018.

Cash Flow Hedges

In 2008, we entered into interest rate derivative instruments to hedge projected exposures to interest rates in anticipation of a debt offering. These hedges were terminated at the time of the issuance of the debt, and the associated loss is being amortized from “Accumulated Other Comprehensive Loss” to interest expense over the remaining term of the debt. As of September 30, 2018, we had net unamortized losses of $8 million associated with our cash flow hedge terminations. As of September 30, 2018, we did not have any cash flow hedges designated.

Foreign Currency and Warrant Derivative Instruments

At September 30, 2018 and December 31, 2017, we had outstanding foreign currency forward contracts with notional amounts aggregating to $488 million and $767 million, respectively. The notional amounts of our foreign currency forward contracts do not generally represent amounts exchanged by the parties and thus are not a measure of the cash requirements related to these contracts or of any possible loss exposure. The amounts actually exchanged at maturity are calculated by reference to the notional amounts and by other terms of the derivative contracts, such as exchange rates.

Our foreign currency derivatives are not designated as hedges under ASC 815, and the changes in fair value of the contracts are recorded each period in “Other Income (Expense), Net” on the accompanying Condensed Consolidated Statements of Operations.

The total estimated fair values of our foreign currency forward contracts and warrant derivative were as follows:



(Dollars in millions)	September 30, 2018			December 31, 2017			Classification
Derivative assets not designated as hedges:
Foreign currency forward contracts	$	3		$	5		Other Current Assets

Derivative liabilities not designated as hedges:
Foreign currency forward contracts	(2		)	(4		)	Other Current Liabilities
Warrant on Weatherford Shares	(3		)	(70		)	Other Current Liabilities

The amount of derivative instruments’ gain or (loss) on the Condensed Consolidated Statements of Operations is in the table below.



	Three Months Ended September 30,						Nine Months Ended September 30,
(Dollars in millions)	2018			2017			2018			2017			Classification
Foreign currency forward contracts	$	(5	)	$	2		$	(5	)	$	(20	)	Other Income (Expense), Net
Warrant on Weatherford Shares	11			(7		)	67			58			Warrant Fair Value Adjustment