Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2013
Accumulated other comprehensive income [Roll Forward]
Amortization of deferred actuarial losses into earnings net of taxes of $(13), $(21), $(39) and $(63), respectively	$ 24	$ 37	$ 71	$ 111
Accumulated other comprehensive income (loss)	(52)	(745)	(52)	(745)	(189)
Foreign currency translation [Member]
Accumulated other comprehensive income [Roll Forward]
Beginning balance	525	420	504	466
Other comprehensive income (loss)	37	(47)	50	(93)
Purchase of noncontrolling interest	0	0	8	0
Ending balance	562	373	562	373
Pension and post retirement [Member]
Accumulated other comprehensive income [Roll Forward]
Beginning balance	(645)	(1,139)	(692)	(1,213)
Amortization of deferred actuarial losses into earnings net of taxes of $(13), $(21), $(39) and $(63), respectively	24	37	71	111
Ending balance	(621)	(1,102)	(621)	(1,102)
Cash Flow Hedges [Member]
Accumulated other comprehensive income [Roll Forward]
Beginning balance	(8)	11	(1)	16
Deferred gains (losses) arising during the period, net of taxes of $(8), $16, $(3) and $16, respectively	14	(25)	5	(26)
Reclassification of realized (gain) loss to sales and cost of sales, net of taxes of $(1), $0, $(1) and $3, respectively	1	(2)	3	(6)
Ending balance	$ 7	$ (16)	$ 7	$ (16)