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Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Accumulated Other Comprehensive Income (Loss)
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
The tables below present the components of the Company's AOCI, net of tax (in millions):
 
Pension and
Other
Postretirement
Liabilities
 
Fuel Derivatives Contracts
 
Investments and Other
 
Deferred Taxes
 
 
 
Total
Balance at December 31, 2015
$
(363
)
 
$
(215
)
 
$
3

 
$
(256
)
 
$
(831
)
Other comprehensive income (loss) before reclassifications
(517
)
(a)
(4
)
 
—

 
187

 
(334
)
Amounts reclassified from accumulated other comprehensive income
26

 
217

 
(2
)
 
95

 
336

Balance at December 31, 2016
(854
)
 
(2
)
 
1

 
26

 
(829
)
Other comprehensive income (loss) before reclassifications
(306
)
(a)
—

 
(7
)
 
74

 
(239
)
Amounts reclassified from accumulated other comprehensive income
58

 
2

 
—

 
(21
)
 
39

Reclassification of stranded tax effects
—

 
—

 
—

 
(118
)
(b)
(118
)
Balance at December 31, 2017
(1,102
)
 
—

 
(6
)
 
(39
)
 
(1,147
)
Other comprehensive income (loss) before reclassifications
377

(a)
—

 
(5
)
 
(83
)
 
289

Amounts reclassified from accumulated other comprehensive income
62

 
—

 
—

 
(13
)
 
49

Amounts reclassified to retained earnings
—

 
—

 
7

 
(1
)
 
6

Balance at December 31, 2018
$
(663
)
 
$
—

 
$
(4
)
 
$
(136
)

$
(803
)
Details about AOCI Components
 
Amount Reclassified from AOCI to Income
 
Affected Line Item in the Statement Where Net Income is Presented
 
 
Year Ended December 31,
 
 
 
 
2018
 
2017
 
2016
 
 
Fuel derivative contracts
 
 
 
 
 
 
 
 
Fuel contracts-reclassifications of losses into earnings
 
$
—

 
$
2

 
$
217

 
Aircraft fuel
Pension and Postretirement liabilities and other
 
 
 
 
 
 
 
 
Amortization of unrecognized (gains) losses and prior service cost (c)
 
62

 
58

 
26

 
Miscellaneous, net
Investments and other
 
 
 
 
 
 
 
 
Available-for-sale securities - reclassifications of gains into earnings
 
—

 
—

 
(2
)
 
Miscellaneous, net
(a) Prior service credits decreased by $3 million, $0 million and increased by $30 million and actuarial losses decreased by approximately $380 million, and increased $306 million and $560 million for 2018, 2017 and 2016, respectively.
(b) This amount represents the reclassification from AOCI to RE of the stranded tax effects resulting from the enactment of the Tax Cuts and Jobs Act (the "Tax Act").
(c) This AOCI component is included in the computation of net periodic pension and other postretirement costs (see Note 8 of this report for additional information).