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Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of accumulated other comprehensive loss The following table shows the components of accumulated other comprehensive loss:
(in millions)
Pension and Other Benefits Liabilities(2)
Derivative Contracts
Investments
Total
Balance at January 1, 2015 (net of tax effect of $1,279)
$
(7,517
)
$
222

$
(16
)
$
(7,311
)
Changes in value (net of tax effect of $41)
10

43

(45
)
8

Reclassification into earnings (net of tax effect of $16)(1)
153

(125
)
—

28

Balance at December 31, 2015 (net of tax effect of $1,222)
(7,354
)
140

(61
)
(7,275
)
Changes in value (net of tax effect of $293)
(482
)
(19
)
42

(459
)
Reclassification into earnings (net of tax effect of $57)(1)
122

(24
)
—

98

Balance at December 31, 2016 (net of tax effect of $1,458)
(7,714
)
97

(19
)
(7,636
)
Changes in value (net of tax effect of $32)
(264
)
(21
)
148

(137
)
Reclassification into earnings (net of tax effect of $90)(1)
166

(6
)
(8
)
152

Balance at December 31, 2017 (net of tax effect of $1,400)
$
(7,812
)
$
70

$
121

$
(7,621
)
 
(1) 
Amounts reclassified from AOCI for pension and other benefits liabilities and for derivative contracts designated as foreign currency cash flow hedges are recorded in salaries and related costs and in passenger revenue, respectively, in the Consolidated Statements of Operations. The reclassification into earnings for investments relates to our investment in Grupo Aeroméxico and the related conversion to accounting under the equity method. The reclassification of the unrealized gain was recorded to non-operating expense in our Consolidates Statements of Operations.
(2) 
Includes $700 million of deferred income tax expense, primarily related to pension obligations, that will not be recognized in net income until the pension obligations are fully extinguished. We consider all income sources, including other comprehensive income, in determining the amount of tax benefit allocated to continuing operations.