Discontinued Operations Discontinued Operations, Income Statement Disclosures (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations attributable to noncontrolling interests	$ 0	$ 21	$ 9	$ 61
Income (loss) from discontinued operations	$ 0	$ 36	$ (43)	$ (542)
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		$ 85		$ 780
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	$ (11)			85
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Separation costs		127	$ 79	287
Net sales		4,362	1,434	12,893
Income from discontinued operations before income taxes		185	1	520
Provision for income taxes on discontinued operations		128	35	1,001
Income from discontinued operations attributable to noncontrolling interests		21	9	61
Income (loss) from discontinued operations		$ 36	$ (43)	$ (542)