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Accumulated Other Comprehensive Loss
 6 Months Ended
Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Loss ACCUMULATED OTHER COMPREHENSIVE LOSS
  
The following tables show the components of accumulated other comprehensive loss:
(in millions)
Pension and Other Benefits Liabilities(3)
Derivative Contracts and Other
Available-for-Sale Investments
Total
Balance at January 1, 2018 (net of tax effect of $1,400)
$
(7,812
)
$
85

$
106

$
(7,621
)
Changes in value (net of tax effect of $1)
—

4

—

4

Reclassifications into retained earnings (net of tax effect of $61)(1)
—

—

(106
)
(106
)
Reclassifications into earnings (net of tax effect of $35)(2)
111

6

—

117

Balance at June 30, 2018 (net of tax effect of $1,426)
$
(7,701
)
$
95

$
—

$
(7,606
)

 
 
 
 
 
Balance at January 1, 2017 (net of tax effect of $1,458)
$
(7,714
)
$
114

$
(36
)
$
(7,636
)
Changes in value (net of tax effect of $6)
—

(14
)
32

18

Reclassifications into earnings (net of tax effect of $40)(2)
83

(7
)
(7
)
69

Balance at June 30, 2017 (net of tax effect of $1,424)
$
(7,631
)
$
93

$
(11
)
$
(7,549
)


(1) 
The reclassification into retained earnings relates to our investments in GOL, China Eastern and other available-for-sale investments, and the related conversion to accounting for changes in fair value of these investments from AOCI to the income statement. See Note 1, "Summary of Significant Accounting Policies," for more information.
(2) 
Amounts reclassified from AOCI for pension and other benefits liabilities and for derivative contracts designated as foreign currency cash flow hedges are recorded in miscellaneous, net and in passenger revenue, respectively, in the income statement. 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 income statement.
(3) 
Includes $700 million of deferred income tax expense primarily related to pension and other benefit obligations that will not be recognized in net income until these obligations are fully extinguished. We consider all income sources, including other comprehensive income, in determining the amount of tax benefit allocated to continuing operations.