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Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Accumulated Other Comprehensive Income (Loss) ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) ("AOCI")
The tables below present the components of the Company's AOCI, net of tax (in millions):
 
 
Pension and
Other
Postretirement
Liabilities
 
Investments and Other
 
Deferred Taxes
 
 
 
Total
Balance at December 31, 2016
 
$
(854
)
 
$
(1
)
 
$
26

 
$
(829
)
Change in value
 
(306
)
(a)
(7
)
 
74

 
(239
)
Amounts reclassified to earnings
 
58

 
2

 
(21
)
 
39

Reclassification of stranded tax effects
 
—

 
—

 
(118
)
(b)
(118
)
Balance at December 31, 2017
 
(1,102
)
 
(6
)
 
(39
)
 
(1,147
)
Change in value
 
377

(a)
(5
)
 
(83
)
 
289

Amounts reclassified to earnings
 
62

 
—

 
(13
)
 
49

Amounts reclassified to retained earnings ("RE")
 
—

 
7

(c)
(1
)
(c)
6

Balance at December 31, 2018
 
(663
)
 
(4
)
 
(136
)

(803
)
Change in value
 
105

(a)
7

 
(24
)
 
88

Amounts reclassified to earnings
 
(2
)
 
(1
)
 
—

 
(3
)
Balance at December 31, 2019
 
$
(560
)
 
$
2

 
$
(160
)
 
$
(718
)
(a) This AOCI component is included in the computation of net periodic pension and other postretirement costs. See Note 7 of this report for additional information on pensions and other postretirement liabilities.
(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) These amounts represent the reclassification from AOCI to RE of the unrealized loss, and related tax, on the Company's investment in Azul Linhas Aéreas Brasileiras S.A. ("Azul") which was classified as an available-for-sale security prior to the Company adopting Accounting Standards Update No. 2016-01, Financial Instruments—Overall (Subtopic 825-10) effective January 1, 2018.