RETIREMENT MEDICAL PLANS (Details 3) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Retiree Medical Liability Current And Long Term Components
Long-term - included in retirement benefits	$ 775	$ 886
Retiree Medical Plan [Member]
Retiree Medical Liability Current And Long Term Components
Current - included in compensation and benefits	33	37
Long-term - included in retirement benefits	446	476
Retiree medical liability	$ 479	$ 513