Other Deductions - Net - Additional Information about Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Apr. 01, 2012
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Intangible assets, fair value	$ 564
Impairment charges	395		395
In Process Research And Development [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Intangible assets, fair value	564	[1],[2]
Impairment charges	394	[1]	297
Fair Value, Inputs, Level 1 [Member] | In Process Research And Development [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Intangible assets, fair value	0	[1],[2]
Fair Value, Inputs, Level 2 [Member] | In Process Research And Development [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Intangible assets, fair value	0	[1],[2]
Fair Value, Inputs, Level 3 [Member] | In Process Research And Development [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Intangible assets, fair value	$ 564	[1],[2]

[1] Reflects an intangible asset written down to its fair value of $564 million in the first quarter of 2013. Fair value was determined using the income approach, specifically the multi-period excess earnings method, also known as the discounted cash flow method. We started with a forecast of all the expected net cash flows associated with the asset and then we applied an asset-specific discount rate to arrive at a net present value amount. Some of the more significant estimates and assumptions inherent in this approach include: the amount and timing of the projected net cash flows, which includes the expected impact of competitive, legal and/or regulatory forces on the product; the discount rate, which seeks to reflect the various risks inherent in the projected cash flows; and the tax rate, which seeks to incorporate the geographic diversity of the projected cash flows.

[2] The fair value amount is presented as of the date of impairment, as this asset is not measured at fair value on a recurring basis. See also Note 1C. Basis of Presentation and Significant Accounting Policies: Fair Value.