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Accumulated Other Comprehensive Income (Loss)
3 Months Ended
Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss) ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Activity in Accumulated other comprehensive income (loss) for the three months ended December 31, 2020 and 2019 is shown below, net of income taxes:  
Three Months Ended December 31,
2019 2020 
Foreign currency translation
   Beginning balance$(794)(711)
   Other comprehensive income (loss), net of tax of $6 and $19, respectively
99 189 
   Ending balance(695)(522)
Pension and postretirement
   Beginning balance(928)(864)
Amortization of deferred actuarial losses into earnings, net of tax of $(9) and $(8),
  respectively
28 27 
   Ending balance(900)(837)
Cash flow hedges
   Beginning balance— (2)
Deferral of gains (losses) arising during the period, net of tax of $(6) and $(11),
  respectively
21 34 
   Reclassification of realized (gains) losses to sales and cost of sales, net of tax of
     $0 and $1, respectively
(2)(3)
   Ending balance19 29 
Accumulated other comprehensive income (loss)$(1,576)(1,330)