EMPLOYEE STOCK PLANS - Activity Under Employee Stock Plans (Detail) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended
	Mar. 31, 2017 USD ($) $ / shares shares
Number of Shares
Balance at beginning of period (in shares) | shares	2.6
Granted (in shares) | shares	0.5
Adjustment due to distribution (in shares) | shares	0.3
Cancelled or expired (in shares) | shares	(0.4)
Exercised (in shares) | shares	(0.2)
Balance at end of period (in shares) | shares	2.8
Exercisable (in shares) | shares	1.5
Weighted Average Exercise Price
Balance at beginning of period (in dollars per share)	$ 74.69
Granted (in dollars per share)	80.40
Adjustment due to distribution (in dollars per share)	70.15
Cancelled or expired (in dollars per share)	69.79
Exercised (in dollars per share)	60.57
Balance at end of period (in dollars per share)	72.23
Exercisable (in dollars per share)	$ 69.78
Weighted Average Remaining Term (in years)
Balance at end of period (in years)	4 years 10 months 28 days
Exercisable (in years)	3 years 10 months 24 days
Aggregate Intrinsic Value
Balance at end of period | $	$ 52.8
Exercisable | $	$ 32.7
Share price (in dollars per share)	$ 91.13