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Accumulated Other Comprehensive Income (Loss) (Tables)
 6 Months Ended
Jun. 30, 2018
Equity [Abstract]  
Components of Accumulated Other Comprehensive Income, Net of Tax
The tables below present the components of the Company's accumulated other comprehensive income (loss), net of tax ("AOCI") (in millions):
 
UAL
 
Pension and Other Postretirement Liabilities

Investments and Other

Income Taxes

Total
 
 
Balance at March 31, 2018
 
$
(1,063
)

$
(3
)

$
(48
)

$
(1,114
)
 
Changes in value
 
1

 
1

 
—

 
2

 
Amounts reclassified to earnings
 
14

 
—

 
(4
)
 
10

 
Net change
 
15


1


(4
)

12

 
Balance at June 30, 2018
 
$
(1,048
)

$
(2
)

$
(52
)

$
(1,102
)
 
Balance at December 31, 2017
 
$
(1,102
)

$
(6
)

$
(39
)

$
(1,147
)
 
Changes in value
 
24

 
(3
)
 
(6
)
 
15

 
Amounts reclassified to earnings
 
30

 
—

 
(7
)
 
23

 
Amounts reclassified to retained earnings
 
—

 
7

 
—

 
7

 
Net change
 
54


4


(13
)

45

 
Balance at June 30, 2018
 
$
(1,048
)

$
(2
)

$
(52
)

$
(1,102
)
 
 
 
 
 
 
 
 
 
 
 
Balance at March 31, 2017
 
$
(867
)
 
$
1

 
$
30

 
$
(836
)
 
Changes in value
 
(7
)
 
(17
)
 
8

 
(16
)
 
Amounts reclassified to earnings
 
14

 
—

 
(6
)
 
8

 
Net change
 
7

 
(17
)
 
2

 
(8
)
 
Balance at June 30, 2017
 
$
(860
)
 
$
(16
)
 
$
32

 
$
(844
)
 
Balance at December 31, 2016
 
$
(854
)
 
$
(1
)
 
$
26

 
$
(829
)
 
 Changes in value
 
(33
)
 
(17
)
 
18

 
(32
)
 
  Amounts reclassified to earnings
 
27

 
2

 
(12
)
 
17

 
Net change
 
(6
)
 
(15
)
 
6

 
(15
)
 
Balance at June 30, 2017
 
$
(860
)
 
$
(16
)
 
$
32

 
$
(844
)


 

Details for AOCI Components Reclassified to Income
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
Affected Line Item
in the Statements of
 Consolidated Operations
 
 
2018
 
2017
 
2018
 
2017
 
 
Pension and other postretirement liabilities
 
 
 
 
 
 
 
 
 
 
Amortization of unrecognized losses and prior service cost (a)
 
$
14

 
$
14

 
$
30

 
$
27

 
Miscellaneous, net
Investments and Other
 
 
 
 
 
 
 
 
 
 
Reclassifications of losses into earnings related to fuel derivative contracts
 
—

 
—

 
—

 
2

 
Aircraft fuel
(a) This AOCI component is included in the computation of net periodic pension and other postretirement costs (see Note 6 to the financial statements included in this Part I, Item 1 for additional information).