Condensed Consolidated Statement of Equity Statement - USD ($)
shares in Millions, $ in Millions
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Treasury Stock [Member]
Noncontrolling Interest [Member]
Shares Outstanding at Sep. 30, 2014   134.0          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2014 $ 1,889 $ 2 $ 1,489 $ 4,605 $ (1,366) $ (2,846) $ 5
Net income 324     324      
Other comprehensive income (16)       (16)    
Cash dividends (80)     (80)      
Exercise of stock options, shares   0.8          
Exercise of stock options 33   (10)     43  
Vesting of performance shares and restricted stock, shares   0.1          
Vesting of performance shares and restricted stock (5)   (9)     4  
Excess tax pools 8   8        
Employee stock purchase plan 6   2     4  
Employee savings plan, shares   0.2          
Employee savings plan 18   6     12  
Stock-based compensation 12   12        
Treasury share repurchases, shares   (2.9)          
Treasury share repurchases (237)         (237)  
Other 1           1
Shares Outstanding at Mar. 31, 2015   132.2          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2015 1,953 $ 2 1,498 4,849 (1,382) (3,020) 6
Shares Outstanding at Sep. 30, 2015   131.9          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Sep. 30, 2015 1,880 $ 2 1,519 5,124 (1,699) (3,071) 5
Net income 306     306      
Other comprehensive income 29       29    
Cash dividends (86)     (86)      
Exercise of stock options, shares   0.2          
Exercise of stock options 13   (1)     14  
Vesting of performance shares and restricted stock, shares   0.1          
Vesting of performance shares and restricted stock (8)   (12)     4  
Excess tax pools 0   0        
Stock Issued During Period, Shares, Employee Stock Purchase Plans   0.1          
Employee stock purchase plan 5   1     4  
Employee savings plan, shares   0.2          
Employee savings plan 22   7     15  
Stock-based compensation 15   15        
Treasury share repurchases, shares   (2.1)          
Treasury share repurchases (188)         (188)  
Treasury share retirements [1] 0 $ (1) (44) $ (2,353)   2,398  
Other 1         1
Shares Outstanding at Mar. 31, 2016   130.4          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2016 $ 1,989 $ 1 $ 1,485 $ 2,991 $ (1,670) $ (824) $ 6
Treasury Stock, Shares, Retired [1]           40.0  
Treasury Stock Retirement Weighted Average Price per Share [1]           $ 59.95  
[1] During the six months ended March 31, 2016, the Company retired 40 million shares of treasury stock. These shares were retired at a weighted-average price of $59.95 per share, resulting in a $2.4 billion reduction in treasury stock. The retired shares were returned to the status of authorized and unissued.