Accumulated Other Comprehensive Loss (Tables)
 9 Months Ended
Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of components of accumulated other comprehensive loss
The following tables show the components of accumulated other comprehensive loss:
(in millions)
Pension and Other Benefit Liabilities(2)
Other(3)
Total
Balance at January 1, 2020 (net of tax effect of $1,549)
$(8,095)$106 $(7,989)
Changes in value (net of tax effect of $31)
(102)17 (85)
Reclassifications into earnings (net of tax effect of $149)(1)
218 (83)135 
Balance at September 30, 2020 (net of tax effect of $1,431)
$(7,979)$40 $(7,939)

Balance at January 1, 2019 (net of tax effect of $1,492)
$(7,925)$100 $(7,825)
Changes in value (net of tax effect of $2)
(12)4 (8)
Reclassifications into earnings (net of tax effect of $57)(1)
189 (1)188 
Balance at September 30, 2019 (net of tax effect of $1,437)
$(7,748)$103 $(7,645)

(1)Amounts reclassified from AOCI for pension and other benefit liabilities and for derivative contracts designated as foreign currency cash flow hedges are recorded in miscellaneous, net in non-operating expense and in passenger revenue, respectively, in our income statement.
(2)Includes $755 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 results from operations.
(3)In the June 2020 quarter, all remaining foreign currency hedges expired, and we recognized an $83 million tax benefit which was released from AOCI.