Restructuring Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013
EQIP [Member]
Restructuring Cost And Reserve [Line Items]
Expected completed date of restructuring program		Dec. 31, 2016
Asset impairment of land held for sale	$ (4)
Restructuring payments		72
Restructuring expected accrual to pay	38	38
Restructuring expected accrual remaining to pay	5	5
Capital expenditures		10	0
EQIP [Member] | Minimum [Member]
Restructuring Cost And Reserve [Line Items]
Reduction in headcount, employees	750	750
Expected associated cost related to restructuring		190
Capital expenditures related to restructuring and associated activities		50
EQIP [Member] | Minimum [Member] | Severance and Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Expected associated cost related to restructuring		105
EQIP [Member] | Minimum [Member] | Facility Relocation and Closures [Member]
Restructuring Cost And Reserve [Line Items]
Expected associated cost related to restructuring		85
EQIP [Member] | Maximum [Member]
Restructuring Cost And Reserve [Line Items]
Reduction in headcount, employees	900	900
Expected associated cost related to restructuring		210
Capital expenditures related to restructuring and associated activities		55
EQIP [Member] | Maximum [Member] | Severance and Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Expected associated cost related to restructuring		120
EQIP [Member] | Maximum [Member] | Facility Relocation and Closures [Member]
Restructuring Cost And Reserve [Line Items]
Expected associated cost related to restructuring		90
IOP [Member]
Restructuring Cost And Reserve [Line Items]
Capital expenditures		1	7
Cumulative cash payments	$ 205	$ 205