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Changes in Accumulated Other Comprehensive Income (Loss)
 9 Months Ended
Sep. 30, 2023
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
Changes In Accumulated Other Comprehensive Income (Loss) Changes in Accumulated Other Comprehensive Income (Loss)
AOCI is comprised of items that have not been recognized in earnings but may be recognized in earnings in the future when certain events occur. Changes in each component for the three and nine months ended September 30, 2023 and 2022 were as follows:
Three Months Ended September 30, 2023 (Millions), net of taxNet Unrealized
Gains (Losses) on
Debt Securities
Foreign Currency
Translation Adjustment Gains (Losses), net of hedges (a)
Net Unrealized
Pension and Other
Postretirement
Benefit Gains
(Losses)		Accumulated Other
Comprehensive
Income (Loss)
Balances as of June 30, 2023$(44)$(2,569)$(471)$(3,084)
Net change14 (110)4 (92)
Balances as of September 30, 2023$(30)$(2,679)$(467)$(3,176)
Nine Months Ended September 30, 2023 (Millions), net of taxNet Unrealized
Gains (Losses) on
Debt Securities
Foreign Currency
Translation Adjustment Gains (Losses), net of hedges (a)
Net Unrealized
Pension and Other
Postretirement
Benefit Gains
(Losses)		Accumulated Other
Comprehensive
 Income (Loss)
Balances as of December 31, 2022$(64)$(2,622)$(524)$(3,210)
Net change34 (57)57 34 
Balances as of September 30, 2023$(30)$(2,679)$(467)$(3,176)
Three Months Ended September 30, 2022 (Millions), net of taxNet Unrealized Gains (Losses) on Debt Securities
Foreign Currency
Translation
Adjustment Gains (Losses), net of hedges (a)
Net Unrealized
Pension and Other
Postretirement
Benefit Gains (Losses)		Accumulated Other Comprehensive Income (Loss)
Balances as of June 30, 2022
$(30)$(2,569)$(544)$(3,143)
Net change(39)(200)5 (234)
Balances as of September 30, 2022$(69)$(2,769)$(539)$(3,377)
Nine Months Ended September 30, 2022 (Millions), net of taxNet Unrealized Gains (Losses) on Debt Securities
Foreign Currency
Translation
Adjustment Gains (Losses), net of hedges (a)
Net Unrealized
Pension and Other
Postretirement
Benefit Gains (Losses)		Accumulated Other Comprehensive Income (Loss)
Balances as of December 31, 2021$23 $(2,392)$(576)$(2,945)
Net change(92)(377)37 (432)
Balances as of September 30, 2022$(69)$(2,769)$(539)$(3,377)
(a)Refer to Note 8 for additional information on hedging activity.
The following table shows the tax impact for the three and nine months ended September 30 for the changes in each component of AOCI presented above:
Tax expense (benefit)
Three Months Ended
September 30,		Nine Months Ended
September 30,
(Millions)2023202220232022
Net unrealized gains (losses) on debt securities$5 $(13)$11 $(29)
Foreign currency translation adjustment, net of hedges66 169 (32)231 
Pension and other postretirement benefits6 16 6 33 
Total tax impact$77 $172 $(15)$235 
Reclassifications out of AOCI into the Consolidated Statements of Income, net of taxes, for the three and nine months ended September 30, 2023 and 2022 were not significant.