Equity Roll Forward (Tables)

6 Months Ended

Mar. 31, 2016

Equity [Abstract]

Schedule of Stockholders' Equity

The change in equity for the first six months of 2016 is shown below (in millions):  

	Common Stockholders' Equity			Noncontrolling Interests in Subsidiaries		Total Equity
Balance at September 30, 2015	$	8,081		47		8,128
Net earnings	718			11		729
Other comprehensive income (loss)	35			1		36
Cash dividends	(616		)	(8	)	(624	)
Net purchases of common stock	(526		)	—		(526	)
Balance at March 31, 2016	$	7,692		51		7,743