Pension Plans, Postretirement and Other Employee Benefits - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employee matching contributions	The company matching contribution has changed from 50 percent on the first eight percent of employee contributions to 100 percent on the first three percent and 50 percent on the next two percent of employee contributions
United States Pension Plans of US Entity, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	21
Foreign Pension Plans, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	16
Pension Plans, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	11
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	7
Employer contributions	2