Restructuring - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended	75 Months Ended	9 Months Ended	0 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2014	Sep. 30, 2015	Apr. 26, 2013 Employees	Dec. 31, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 7	$ 5
Cash payments	7
Restructuring costs in accrued expenses	17		17	17			17		19
Environmental Remediation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs in accrued expenses	2		2	2			2		2
Severance and Employee Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3
Cash payments	4
Restructuring costs in accrued expenses	14		14	14			14		16
Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Additional restructuring charges after current fiscal					1			1
Previous Actions and Sites Pending Sale [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2
Severance charges			67
Other charges			22
Expected restructuring charges	164		164	164			164
Cash payments				86
Site demolition, clearing and environmental remediation costs			10
Restructuring accelerated depreciation and asset impairments			66
Gain on sale of asset			1
Previous Actions and Sites Pending Sale [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		1
Previous Actions and Sites Pending Sale [Member] | Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Cash payments					3
Closure of Port Dickson [Member]
Restructuring Cost and Reserve [Line Items]
Severance charges	2
Expected restructuring charges	20		20	20			20
Equity share in CMSB						50.10%
Affected employees						90
Accelerated depreciation and asset write-offs	15
Portion of the charges that are allocable to the noncontrolling interest	49.90%		49.90%	49.90%			49.90%
Site demolition, clearing and environmental remediation costs	2
Expected cumulative net cash outlays related to plan	8		8	8			8
Closure of Port Dickson [Member] | Environmental Remediation [Member]
Restructuring Cost and Reserve [Line Items]
Expected cumulative net cash outlays related to plan	5		5	5			5
Closure of Port Dickson [Member] | Severance and Employee Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Expected cumulative net cash outlays related to plan	2		2	2			2
Closure of Port Dickson [Member] | Facility Closure Costs [Member]
Restructuring Cost and Reserve [Line Items]
Expected cumulative net cash outlays related to plan	1		1	1			1
Closure of Port Dickson [Member] | Severance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Cash payments							4
Closure of Port Dickson [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Other charges	1	1
Restructuring costs in accrued expenses	1		1	1			1
Closure of Port Dickson [Member] | Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Cash payments					4
Restructuring Activities Other [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	1	4	1	1			1
Restructuring Activities Other [Member] | Severance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Cash payments	1
Accrued severance charges	2		2	2			2
Restructuring Activities Other [Member] | Scenario, Forecast [Member] | Severance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Cash payments					3
Restructuring Activities Other [Member] | Previous Actions and Sites Pending Sale [Member] | Severance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Accrued severance charges	3		3	3			3
Shared Service Center Transition [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4						22
Severance charges							16
Other charges	3						6
Cash payments							9
Restructuring costs in accrued expenses	12		12	12			12
Shared Service Center Transition [Member] | Severance and Employee Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Severance charges	1
Cash payments							3
Shared Service Center Transition [Member] | Other Transition Costs [Member]
Restructuring Cost and Reserve [Line Items]
Cash payments							6
Shared Service Center Transition [Member] | Scenario, Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Severance charges								17
Other charges								8
Expected restructuring charges					25			25
Cash payments					15
Shared Service Center Transition [Member] | Scenario, Forecast [Member] | Severance and Employee Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Cash payments					3
Shared Service Center Transition [Member] | Scenario, Forecast [Member] | Other Transition Costs [Member]
Restructuring Cost and Reserve [Line Items]
Cash payments					$ 12