Pension Plans, Postretirement and Other Employee Benefits - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
United States Pension Plans of US Entity, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	$ 7
Foreign Pension Plans, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	4
Pension Plans, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer estimated contributions	36
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	2
Employer estimated contributions	$ 6