Airline operators are inherently dependent upon energy to operate and, therefore, are impacted by changes in jet fuel prices. Furthermore, jet fuel and oil typically represents one of the largest operating expenses for airlines. The Company endeavors to acquire jet fuel at the lowest possible cost and to reduce volatility in operating expenses through its fuel hedging program. Although the Company may periodically enter into jet fuel derivatives for short-term timeframes, because jet fuel is not widely traded on an organized futures exchange, there are limited opportunities to hedge directly in jet fuel for time horizons longer than approximately 24 months into the future. However, the Company has found that financial derivative instruments in other commodities, such as West Texas Intermediate ("WTI") crude oil, Brent crude oil, and refined products, such as heating oil and unleaded gasoline, can be useful in decreasing its exposure to jet fuel price volatility. The Company does not purchase or hold any financial derivative instruments for trading or speculative purposes.

The Company has used financial derivative instruments for both short-term and long-term timeframes, and primarily uses a mixture of purchased call options, collar structures (which include both a purchased call option and a sold put option), call spreads (which include a purchased call option and a sold call option), put spreads (which include a purchased put option and a sold put option), and fixed price swap agreements in its portfolio. Although the use of collar structures and swap agreements can reduce the overall cost of hedging, these instruments carry more risk than purchased call options in that the Company could end up in a liability position when the collar structure or swap agreement settles.

For the purpose of evaluating its net cash spend for jet fuel and for forecasting its future estimated jet fuel expense, the Company evaluates its hedge volumes strictly from an "economic" standpoint and thus does not consider whether the hedges have qualified or will qualify for hedge accounting. The Company defines its "economic" hedge as the net volume of fuel derivative contracts held, including the impact of positions that have been offset through sold positions, regardless of whether those contracts qualify for hedge accounting. The level at which the Company is economically hedged for a particular period is also dependent on current market prices for that period, as well as the types of derivative instruments held and the strike prices of those instruments. For example, the Company may enter into "out-of-the-money" option contracts (including "catastrophic" protection), which may not generate intrinsic gains at settlement if market prices do not rise above the option strike price. Therefore, even though the Company may have an economic hedge in place for a particular period, that hedge may not produce any hedging gains at settlement and may even produce hedging losses depending on market prices, the types of instruments held, and the strike prices of those instruments.

For the three months ended March 31, 2019, the Company had fuel derivative instruments in place for up to 84 percent of its fuel consumption. As of March 31, 2019, the Company also had fuel derivative instruments in place to provide coverage at varying price levels, but up to a maximum of approximately 67 percent of its remaining 2019 estimated fuel consumption, depending on where market prices settle. The following table provides information about the Company’s volume of fuel hedging on an economic basis considering current market prices:



	Maximum fuel hedged as of
	March 31, 2019	Derivative underlying commodity type as of
Period (by year)	(gallons in millions) (a)	March 31, 2019
Remainder of 2019	1,103	WTI crude and Brent crude oil
2020	1,301	WTI crude oil, Brent crude oil, and Heating oil
2021	698	WTI crude and Brent crude oil
2022	88	WTI crude oil

The Company's results are subject to the possibility that the derivatives will no longer qualify for hedge accounting, in which case any change in the fair value of derivative instruments since the last reporting period would be recorded in Other (gains) losses, net, in the unaudited Condensed Consolidated Statement of Comprehensive Income in the period of the change; however, any amounts previously recorded to AOCI would remain there until such time as the original forecasted transaction occurs, at which time these amounts would be reclassified to Fuel and oil expense. Factors that have and may continue to lead to the loss of hedge accounting include: significant fluctuation in energy prices, significant weather events affecting refinery capacity and the production of refined products, and the volatility of the different types of products the Company uses in hedging. Increased volatility in these commodity markets for an extended period of time, especially if such volatility were to worsen, could cause the Company to lose hedge accounting altogether for the commodities used in its fuel hedging program, which would create further volatility in the Company’s GAAP financial results. However, even though derivatives may not qualify for hedge accounting, the Company continues to hold the instruments as management believes derivative instruments continue to afford the Company the opportunity to stabilize jet fuel costs. When the Company has sold derivative positions in order to effectively "close" or offset a derivative already held as part of its fuel derivative instrument portfolio, any subsequent

changes in fair value of those positions are marked to market through earnings. Likewise, any changes in fair value of those positions that were offset by entering into the sold positions and were de-designated as hedges are concurrently marked to market through earnings. However, any changes in value related to hedges that were deferred as part of AOCI while designated as a hedge would remain until the originally forecasted transaction occurs. In a situation where it becomes probable that a fuel hedged forecasted transaction will not occur, any gains and/or losses that have been recorded to AOCI would be required to be immediately reclassified into earnings. The Company did not have any such situations occur during 2018, or during the three months ended March 31, 2019.

All cash flows associated with purchasing and selling fuel derivatives are classified as Other operating cash flows in the unaudited Condensed Consolidated Statement of Cash Flows. The following table presents the location of all assets and liabilities associated with the Company’s derivative instruments within the unaudited Condensed Consolidated Balance Sheet:



		Asset derivatives				Liability derivatives
	Balance Sheet	Fair value at		Fair value at		Fair value at		Fair value at
(in millions)	location	3/31/2019		12/31/2018		3/31/2019		12/31/2018
Derivatives designated as hedges (a)
Fuel derivative contracts (gross)	Prepaid expenses and other current assets	$	104	$	43	$	—	$	—
Fuel derivative contracts (gross)	Other assets	150		95		—		—
Interest rate derivative contracts	Accrued liabilities	—		—		15		2
Interest rate derivative contracts	Other noncurrent liabilities	—		—		8		12
Total derivatives designated as hedges		$	254	$	138	$	23	$	14



Balance Sheet location of hedged item	Carrying amount of the hedged liabilities				Cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged liabilities (a)
	March 31,				March 31,
(in millions)	2019		2018		2019		2018
Current maturities of long-term debt	$	300	$	—	$	2	$	—
Long-term debt less current maturities	495		784		13		5
	$	795	$	784	$	15	$	5



	Balance Sheet	March 31,		December 31,
(in millions)	location	2019		2018
Cash collateral deposits held from counterparties for fuel contracts - current	Offset against Prepaid expenses and other current assets	$	15	$	—
Due to third parties for fuel contracts	Accounts payable	7		—
Receivable from third parties for fuel contracts	Accounts and other receivables	6		2

All of the Company's fuel derivative instruments and interest rate swaps are subject to agreements that follow the netting guidance in the applicable accounting standards for derivatives and hedging. The types of derivative instruments the Company has determined are subject to netting requirements in the accompanying unaudited Condensed Consolidated Balance Sheet are those in which the Company pays or receives cash for transactions with the same counterparty and in the same currency via one net payment or receipt. For cash collateral held by the Company or provided to counterparties, the Company nets such amounts against the fair value of the Company's derivative portfolio by each counterparty. The Company has elected to utilize netting for both its fuel derivative instruments and interest rate swap agreements and also classifies such amounts as either current or noncurrent, based on the net fair value position with each of the Company's counterparties in the unaudited Condensed Consolidated Balance Sheet.

The Company's application of its netting policy associated with cash collateral differs depending on whether its derivative instruments are in a net asset position or a net liability position. If its fuel derivative instruments are in a net asset position with a counterparty, cash collateral amounts held are first netted against current outstanding derivative asset amounts associated with that counterparty until that balance is zero, and then any remainder is applied against the fair value of noncurrent outstanding derivative instruments. If the Company's fuel derivative instruments are in a net liability position with the counterparty, cash collateral amounts provided are first netted against noncurrent outstanding derivative amounts associated with that counterparty until that balance is zero, and then any remainder is applied against the fair value of current outstanding derivative instruments.



Offsetting of derivative assets
(in millions)
		(i)		(ii)			(iii) = (i) + (ii)			(i)		(ii)		(iii) = (i) + (ii)
		March 31, 2019								December 31, 2018
Description	Balance Sheet location	Gross amounts of recognized assets		Gross amounts offset in the Balance Sheet			Net amounts of assets presented in the Balance Sheet			Gross amounts of recognized assets		Gross amounts offset in the Balance Sheet		Net amounts of assets presented in the Balance Sheet
Fuel derivative contracts	Prepaid expenses and other current assets	$	104	$	(15	)	$	89		$	43	$	—	$	43
Fuel derivative contracts	Other assets	$	150	$	—		$	150	(a)	$	95	$	—	$	95	(a)



Offsetting of derivative liabilities
(in millions)
		(i)		(ii)		(iii) = (i) + (ii)		(i)		(ii)		(iii) = (i) + (ii)
		March 31, 2019						December 31, 2018
Description	Balance Sheet location	Gross amounts of recognized liabilities		Gross amounts offset in the Balance Sheet		Net amounts of liabilities presented in the Balance Sheet		Gross amounts of recognized liabilities		Gross amounts offset in the Balance Sheet		Net amounts of liabilities presented in the Balance Sheet
Interest rate derivative contracts	Accrued liabilities	$	15	$	—	$	15	$	2	$	—	$	2
Interest rate derivative contracts	Other noncurrent liabilities	$	8	$	—	$	8	$	12	$	—	$	12



Location and amount of loss recognized in income on cash flow and fair value hedging relationships
	Three months ended March 31, 2019				Three months ended March 31, 2018
(in millions)	Fuel and oil		Interest expense		Fuel and oil		Interest expense
Total	$	11	$	8	$	4	$	10

Loss on cash flow hedging relationships:
Commodity contracts:
Amount of loss reclassified from AOCI into income	11		—		4		—
Interest contracts:
Amount of loss reclassified from AOCI into income	—		1		—		2

Impact of fair value hedging relationships:
Interest contracts:
Hedged items	—		6		—		6
Derivatives designated as hedging instruments	—		1		—		2

The Company also recorded expense associated with premiums paid for fuel derivative contracts that settled/expired during the three months ended March 31, 2019 and 2018 of $28 million and $34 million, respectively. These amounts are recognized through changes in fair value within AOCI for designated hedges, and are ultimately recorded as a component of Fuel and oil in the unaudited Condensed Consolidated Statement of Comprehensive Income during the period the contracts settle.

The fair values of the derivative instruments, depending on the type of instrument, were determined by the use of present value methods or option value models with assumptions about commodity prices based on those observed in underlying markets or provided by third parties. Included in the Company’s cumulative net unrealized gains from fuel hedges as of March 31, 2019, recorded in AOCI, were approximately $12 million in unrealized gains, net of taxes, which are expected to be realized in earnings during the twelve months subsequent to March 31, 2019.

The Company is party to certain interest rate swap agreements that are accounted for as either fair value hedges or cash flow hedges, as defined in the applicable accounting guidance for derivative instruments and hedging. Several of the Company's interest rate swap agreements qualify for the "shortcut" method of accounting for hedges, which dictates that the hedges are assumed to be perfectly effective, and thus there is no ineffectiveness to be recorded in earnings.

During first quarter 2019, the Company entered into 12 separate forward-starting interest rate swap agreements related to a series of 12 aircraft leases with deliveries scheduled between July 2019 and February 2020. These lease contracts expose the Company to interest rate risk as the rental payments are adjusted and become fixed based on the 9-year swap rate at the time of delivery. The primary objective for these interest rate derivatives was to hedge the forecasted monthly rental payments. These swap agreements provide for a single payment at maturity based upon the change in the 9-year swap rate between the execution date and the termination date. These interest rate derivatives qualify for the "critical terms match" method of accounting for cash flow hedges, which dictates that the hedges are assumed to be perfectly effective, and thus there is no ineffectiveness to be recorded in earnings.

For the Company’s interest rate swap agreements that do not qualify for the "shortcut" or "critical terms match" methods of accounting, ineffectiveness is measured at each reporting period. The ineffectiveness associated with all of the Company’s interest rate swap agreements for all periods presented was not material.

Credit exposure related to fuel derivative instruments is represented by the fair value of contracts that are an asset to the Company at the reporting date. At such times, these outstanding instruments expose the Company to credit loss in the event of nonperformance by the counterparties to the agreements. However, the Company has not experienced any significant credit loss as a result of counterparty nonperformance in the past. To manage credit risk, the Company selects and periodically reviews counterparties based on credit ratings, limits its exposure with respect to each counterparty, and monitors the market position of the fuel hedging program and its relative market position with each counterparty. At March 31, 2019, the Company had agreements with all of its active counterparties containing early termination rights and/or bilateral collateral provisions whereby security is required if market risk exposure exceeds a specified threshold amount based on the counterparty credit rating. The Company also had agreements with counterparties in which cash deposits, letters of credit, and/or pledged aircraft are required to be posted as collateral whenever the net fair value of derivatives associated with those counterparties exceeds specific thresholds. In certain cases, the Company has the ability to substitute among these different forms of collateral at its discretion.

Counterparty (CP)

(in millions)

Other (a)

Total

Fair value of fuel derivatives

254

Cash collateral held from CP

—

Aircraft collateral pledged to CP

—

Letters of credit (LC)

—

Option to substitute LC for aircraft

(200) to (600)(b)

N/A

(150) to (550)(c)

N/A

Option to substitute LC for cash

N/A

(75) to (150) or >(550)(c)

(125) to (150) or >(550)(d)

(d)

N/A

If credit rating is investment

grade, fair value of fuel

derivative level at which:

Cash is provided to CP

(50) to (200) or >(600)

>(50)

(75) to (150) or >(550)(e)

(125) to (150) or >(550)(e)

>(125)

>(70)(e)

Cash is received from CP

>50(e)

>150(e)

>250(e)

>125(e)

>100(e)

>70(e)

Aircraft or cash can be pledged to

CP as collateral

(200) to (600)(f)

N/A

(150) to (550)(c)

N/A

If credit rating is non-investment

grade, fair value of fuel derivative level at which:

Cash is provided to CP

(0) to (200) or >(600)

(g)

(0) to (150) or >(550)

(g)

Cash is received from CP

(g)

Aircraft or cash can be pledged to

CP as collateral

(200) to (600)

N/A

(150) to (550)

N/A