XML 161 R107.htm IDEA: XBRL DOCUMENT v3.5.0.2
Benefit Plans Sensitivity to Changes in Assumed Health Care Cost Trend Rates (Details)
$ in Millions
12 Months Ended
Sep. 30, 2016
USD ($)
Defined Benefit Plan Disclosure  
Effect of one percentage point increase on total service and interest cost components $ 6
Effect of one percentage point decrease on total service and interest cost components (6)
Effect of one percentage point increase on end-of-year accumulated postretirement benefit obligation 105
Effect of one percentage point decrease on end-of-year accumulated postretirement benefit obligation $ (88)