Acquisitions/Divestitures - Microelectronics Disposal Group (Details) - Microelectronics business - Discontinued Operations, Disposed of by Means Other than Sale - USD ($) $ in Millions		3 Months Ended				9 Months Ended		12 Months Ended
	Jul. 01, 2015	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Discontinued Operations
Discontinued operation, period of exclusive manufacturing agreement after disposal	10 years
Pre-tax (charge) credit related to sale			$ 0	$ (57)	$ (4,700)	$ 1	$ (108)	$ (116)
Impairment of long-lived assets to be disposed of					2,400
Total cash consideration expected to be transferred to acquiring company					1,500
Other related costs					$ 800
Cumulative pre-tax charge						$ 4,800
Net cash transferred				515
Cash consideration payable at closing date				$ 750			$ 750
Period of time within which remaining cash consideration is expected to be transferred						2 years
Expected
Discontinued Operations
Net cash transferred		$ 500
Minimum
Discontinued Operations
Transition service agreement duration	1 year
Maximum
Discontinued Operations
Transition service agreement duration	3 years