Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Restructuring Accruals (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 1,571	[1]	$ 1,950	[2]
Other current liabilities	919
Other noncurrent liabilities	652
Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve			1,200
Other Long-Term Liabilties [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve			$ 731

[1] Included in Other current liabilities ($919 million) and Other noncurrent liabilities ($652 million).

[2] Included in Other current liabilities ($1.2 billion) and Other noncurrent liabilities ($731 million).