EMPLOYEE STOCK PLANS - Activity for Restricted Stock, Restricted Stock Units, Deferred Stock Units and Performance Units (Detail) shares in Millions	6 Months Ended
	Mar. 31, 2017 $ / shares shares
Number of Shares
Balance at beginning of period (in shares) | shares	1.0
Granted (in shares) | shares	0.4
Adjustment due to distribution (in shares) | shares	0.1
Vested (in shares) | shares	(0.4)
Cancelled or expired (in shares) | shares	(0.2)
Balance at end of period (in shares) | shares	0.9
Weighted Average Grant-Date Fair Value
Balance at beginning of period (in dollars per share) | $ / shares	$ 73.10
Granted (in dollars per share) | $ / shares	80.75
Adjustment due to distribution (in dollars per share) | $ / shares	74.18
Vested (in dollars per share) | $ / shares	72.69
Cancelled or expired (in dollars per share) | $ / shares	72.45
Balance at end of period (in dollars per share) | $ / shares	$ 76.42