EQUITY - Summary of Certain Information Pertaining to Stock Option Awards Outstanding and Exercisable (Detail) - Stock Option Program and Stock Appreciation Rights Program (SARs) - $ / shares shares in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Awards Outstanding
No. of Options/ SARs (in shares)	1.8	1.8
WTD. Avg. Remaining Life	5 years 10 months 21 days
WTD. Avg. Exercise Price (US$ per share)	$ 51.38	$ 44.38
Awards Exercisable
No. of Options/ SARS (in shares)	1.0
WTD. Avg. Remaining Life	3 years 3 months 22 days
WTD. Avg. Exercise Price (US$ per share)	$ 38.42
$20.59 - $20.59
Range of Exercise Price
Exercise Price, minimum	20.59
Exercise Price, maximum	$ 20.59
Awards Outstanding
No. of Options/ SARs (in shares)	0.2
WTD. Avg. Remaining Life	2 years 4 days
WTD. Avg. Exercise Price (US$ per share)	$ 20.59
Awards Exercisable
No. of Options/ SARS (in shares)	0.2
WTD. Avg. Remaining Life	2 years 4 days
WTD. Avg. Exercise Price (US$ per share)	$ 20.59
$30.07 - $36.86
Range of Exercise Price
Exercise Price, minimum	30.07
Exercise Price, maximum	$ 36.86
Awards Outstanding
No. of Options/ SARs (in shares)	0.2
WTD. Avg. Remaining Life	1 year 1 month 2 days
WTD. Avg. Exercise Price (US$ per share)	$ 36.47
Awards Exercisable
No. of Options/ SARS (in shares)	0.2
WTD. Avg. Remaining Life	1 year 1 month 2 days
WTD. Avg. Exercise Price (US$ per share)	$ 36.47
$38.81 - $49.19
Range of Exercise Price
Exercise Price, minimum	38.81
Exercise Price, maximum	$ 49.19
Awards Outstanding
No. of Options/ SARs (in shares)	0.6
WTD. Avg. Remaining Life	4 years 5 months 5 days
WTD. Avg. Exercise Price (US$ per share)	$ 45.42
Awards Exercisable
No. of Options/ SARS (in shares)	0.6
WTD. Avg. Remaining Life	4 years 5 months 5 days
WTD. Avg. Exercise Price (US$ per share)	$ 45.42
$63.43 - $68.68
Range of Exercise Price
Exercise Price, minimum	63.43
Exercise Price, maximum	$ 68.68
Awards Outstanding
No. of Options/ SARs (in shares)	0.8
WTD. Avg. Remaining Life	8 years 10 months 10 days
WTD. Avg. Exercise Price (US$ per share)	$ 66.24
Awards Exercisable
No. of Options/ SARS (in shares)	0.0
WTD. Avg. Remaining Life	0 years
WTD. Avg. Exercise Price (US$ per share)	$ 0.00