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AOCI
3 Months Ended
Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
AOCI AOCI
AOCI includes the after-tax change in unrecognized net costs related to defined benefit pension and OPEB plans as well as unrealized gains and losses on cash flow hedges and AFS securities.
Three Months Ended March 31, 2020 and 2019
(Dollars in millions)
Pension and OPEB CostsCash Flow HedgesAFS SecuritiesOther, netTotal
AOCI balance, January 1, 2019$(1,164) $(31) $(500) $(20) $(1,715) 
OCI before reclassifications, net of tax—  (30) 314   286  
Amounts reclassified from AOCI:     
Before tax23  (5) (6) —  12  
Tax effect (1) (1) —   
Amounts reclassified, net of tax17  (4) (5) —   
Total OCI, net of tax17  (34) 309   294  
AOCI balance, March 31, 2019  $(1,147) $(65) $(191) $(18) $(1,421) 
AOCI balance, January 1, 2020$(1,122) $(101) $380  $(1) $(844) 
OCI before reclassifications, net of tax—  —  1,690  (5) 1,685  
Amounts reclassified from AOCI:     
Before tax20  15  41  —  76  
Tax effect  10  —  19  
Amounts reclassified, net of tax15  11  31  —  57  
Total OCI, net of tax15  11  1,721  (5) 1,742  
AOCI balance, March 31, 2020  $(1,107) $(90) $2,101  $(6) $898  
Primary income statement location of amounts reclassified from AOCI
Other expenseNet interest incomeNet interest incomeNet interest income