Restructuring - Recorded Restructuring Activities (Detail) $ in Millions	3 Months Ended
	Dec. 31, 2015 USD ($)
Restructuring Cost And Reserve [Line Items]
Restructuring reserve, period expense	$ 48
Cost of Sales [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring reserve, period expense	37
Selling and Administrative Expenses [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring reserve, period expense	6
Research and Technical Expenses [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring reserve, period expense	$ 5