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COMPREHENSIVE INCOME | 3 Months Ended
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Mar. 31, 2018
Equity [Abstract] |
COMPREHENSIVE INCOME | COMPREHENSIVE INCOME Comprehensive income includes changes in the fair value of certain financial derivative instruments that qualify for hedge accounting, unrealized gains and losses on certain investments, and actuarial gains/losses arising from the Company’s postretirement benefit obligation. The differences between Net income and Comprehensive income for the three months ended March 31, 2018 and 2017 were as follows:
| Three months ended March 31,
(in millions) | 2018 |  | 2017
NET INCOME | $ | 463 |  |  | $ | 339 |
Unrealized gain on fuel derivative instruments, net of deferred taxes of $25 and $5 | 81 |  |  | 9 |
Unrealized gain on interest rate derivative instruments, net of deferred taxes of $- and $1 | 3 |  |  | 2 |
Total other comprehensive income | $ | 84 |  |  | $ | 11 |
COMPREHENSIVE INCOME | $ | 547 |  |  | $ | 350 |
A rollforward of the amounts included in AOCI is shown below for the three months ended March 31, 2018:
(in millions) | Fuel derivatives |  | Interest rate derivatives |  | Defined benefit plan items |  | Other |  | Deferred tax |  | Accumulated other comprehensive income (loss)
Balance at December 31, 2017 | $ | 3 |  |  | $ | (7 | ) |  | $ | (9 | ) |  | $ | 33 |  |  | $ | (8 | ) |  | $ | 12 |
ASU 2017-12 adoption adjustment (a) | (26 | ) |  | — |  |  | — |  |  | — |  |  | 6 |  |  | (20 | )
ASU 2018-02 stranded AOCI adoption adjustment (b) | — |  |  | — |  |  | — |  |  | — |  |  | 2 |  |  | 2 |
Changes in fair value | 102 |  |  | 1 |  |  | — |  |  | — |  |  | (24 | ) |  | 79 |
Reclassification to earnings | 4 |  |  | 2 |  |  | — |  |  | — |  |  | (1 | ) |  | 5 |
Balance at March 31, 2018 | $ | 83 |  |  | $ | (4 | ) |  | $ | (9 | ) |  | $ | 33 |  |  | $ | (25 | ) |  | $ | 78 |
(a) The Company adopted the New Hedging Standard as of January 1, 2018. See Note 2 for further information on this adoption. (b) The Company adopted the Reclassification of Certain Tax Effects from AOCI as of January 1, 2018. See Note 2 for further information on this adoption. The following table illustrates the significant amounts reclassified out of each component of AOCI for the three months ended March 31, 2018:
Three months ended March 31, 2018
(in millions) |  | Amounts reclassified from AOCI |  | Affected line item in the unaudited Condensed Consolidated Statement of Comprehensive Income
AOCI components |  |
Unrealized loss on fuel derivative instruments |  | $ | 4 |  |  | Fuel and oil expense
|  | 1 |  |  | Less: Tax expense
|  | $ | 3 |  |  | Net of tax
Unrealized loss on interest rate derivative instruments |  | $ | 2 |  |  | Interest expense
|  | — |  |  | Less: Tax expense
|  | $ | 2 |  |  | Net of tax
Total reclassifications for the period |  | $ | 5 |  |  | Net of tax

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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- References No definition available. + Details
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