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Comprehensive Income (Loss) (Tables)
12 Months Ended
Sep. 30, 2021
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Loss The following summary sets forth the changes in the components of accumulated other comprehensive loss, net of related tax expense of approximately $4 million:
Foreign Currency Translation Loss (a)Minimum Pension Liability AdjustmentDeferred Gains (Losses) On Derivative Financial InstrumentsAccumulated Other Comprehensive Loss, net
(in millions)
Balances at September 30, 2018$(184)$(9)$$(190)
Other comprehensive loss(34)(5)(11)(50)
Balances at September 30, 2019$(218)$(14)$(8)$(240)
Other comprehensive income37 (21)18 
Balances at September 30, 2020$(181)$(12)$(29)$(222)
Other comprehensive income12 20 
Balances at September 30, 2021$(174)$(11)$(17)$(202)
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(a)Includes historical foreign currency translation related to certain intra-entity transactions.