Consolidated Statements of Total Equity (Parenthetical) - shares	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Increase (Decrease) in Stockholders' Equity
Beginning Balances,shares	368,647,371
Issuances under employee benefit plans, shares	89,652	82,446	77,216
Ending Balances, shares	372,923,187	368,647,371
Common Stock
Increase (Decrease) in Stockholders' Equity
Beginning Balances,shares	368,647,371	364,586,694	322,943,618
Issuances under employee benefit plans, shares	89,652	82,446	77,216
Exercise of stock options, shares	3,504,989	3,636,655	2,687,724
Issuance under Performance Unit Plan, shares	681,175	341,576	288,685
Debt Conversion, Converted Instrument, Shares Issued			38,589,451
Ending Balances, shares	372,923,187	368,647,371	364,586,694