Rollforward of Reserves for Federal State and Foreign Tax Jurisdictions (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 23, 2013	Dec. 29, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of year	$ 2,425	$ 2,167
Additions for tax positions related to the current year	41	275
Additions for tax positions from prior years	4	161
Reductions for tax positions from prior years		(172)
Settlement payments		(17)
Statute of limitations expiration	(19)	(3)
Translation and other	(1)	14
Balance, end of period	$ 2,450	$ 2,425

The gross amount of increases or decreases in unrecognized tax benefits resulting from translation and other activity.

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- Definition

The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

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