Supplemental Financial Information - Additional Information (Detail) (USD $) In Billions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Goodwill [Line Items]
Impairment of goodwill			$ 0	$ 0
Accumulated impairment losses	2.4		2.4
Income tax expense related to items of other comprehensive (loss)/income	$ 0	$ 0	$ 0	$ 0

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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+ Details

- Definition

Tax effect of other comprehensive income (loss) attributable to both parent entity and noncontrolling interest.

+ References

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+ Details