Reconciliation of Income Tax Expense Computed Using U.S. Statutory Federal Tax Rate to Actual Income Tax Expense (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation Of Income Taxes [Line Items]
Income tax expense at the U.S. federal statutory tax rate	$ 1,454	$ 1,425	$ 1,271
U.S. manufacturing deduction benefit	(100)	(29)	(106)
Research and development tax credit	(96)		(35)
Tax deductible dividends	(77)	(73)	(62)
Goodwill impairment - non-deductible portion	50
IRS appeals and audit resolution			(89)
Other, net	(26)	4	(15)
Total income tax expense	$ 1,205	$ 1,327	$ 964