Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Mar. 29, 2015	Dec. 28, 2014
Current assets:
Allowances for doubtful accounts	$ 237	$ 275
Shareholders' equity:
Common stock, par value per share	$ 1.00	$ 1.00
Common stock, shares authorized	4,320,000us-gaap_CommonStockSharesAuthorized	4,320,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	3,119,843us-gaap_CommonStockSharesIssued	3,119,843us-gaap_CommonStockSharesIssued
Treasury stock, shares	343,969us-gaap_TreasuryStockShares	336,620us-gaap_TreasuryStockShares

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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