Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	May 31, 2016
Significant Accounting Policies [Line Items]
Value of inventories under FIFO method	$ 28	$ 27
Prepaid expenses and other current assets	47	49
Other assets	$ 45	40
Accounting Standards Update 2015-03 [Member] | Restatement Adjustment [Member]
Significant Accounting Policies [Line Items]
Prepaid expenses and other current assets		1
Other assets		3
Adjustments for New Accounting Principle Early Adoption [Member]
Significant Accounting Policies [Line Items]
Reclassification of current deferred tax assets to noncurrent deferred tax assets		41
Reclassification of current deferred tax liabilities to noncurrent deferred tax liabilities		$ 1
Buildings [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Useful life of property, plant and equipment	20 years
Buildings [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Useful life of property, plant and equipment	25 years
Machinery and Equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Useful life of property, plant and equipment	10 years
Machinery and Equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Useful life of property, plant and equipment	25 years
Other Fixed Assets [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Useful life of property, plant and equipment	3 years
Other Fixed Assets [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Useful life of property, plant and equipment	25 years
Purification Solutions [Member]
Significant Accounting Policies [Line Items]
Percentage of fair value in excess of carrying amount			9.00%