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Shareholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 29, 2012 | Dec. 31, 2011 | Dec. 25, 2010
Repurchase Of Shares Of The Company's Common Stock [Line Items] |  |  |  |  |  |
Shares Repurchased (in shares) | 14,891,000 | [1] | 14,305,000 | [2] | 9,759,000 | [2]
Dollar Value of Shares Repurchased | $ 985 | [1] | $ 733 | [2] | $ 390 | [2]
Value of share repurchases in current fiscal year but with settlement dates in subsequent year | 20 |  | 19 |  |  |
Value of share repurchases in current fiscal year but with settlement dates in subsequent year (in shares) | 300,000 |  | 400,000 |  |  |
Accumulated other comprehensive income (loss), net of tax [Abstract] |  |  |  |  |  |
Foreign currency translation adjustment | 166 |  | 140 |  |  |
Pension and post-retirement losses, net of tax | (286) |  | (375) |  |  |
Net unrealized losses on derivative instruments, net of tax | (12) |  | (12) |  |  |
Total accumulated other comprehensive income (loss) | (132) |  | (247) |  |  |
Current year additions to translation adjustments and gains (losses) from intra-entity transactions of investment nature, net of tax and reclassifications | 26 |  |  |  |  |
Tax (expense) benefit on translation adjustments and gains (losses) from intra-entity transactions of a long-term investment nature | (3) |  | 3 |  | 5 |
Reclassifications of currency translation adjustments into Net Income | 3 |  | 0 |  | 0 |
November 2012 [Member] |  |  |  |  |  |
Repurchase Of Shares Of The Company's Common Stock [Line Items] |  |  |  |  |  |
Shares Repurchased (in shares) | 1,069,000 |  | 0 |  | 0 |
Dollar Value of Shares Repurchased | 47 |  | 0 |  | 0 |
Remaining dollar value of shares that may be repurchased | 953 |  |  |  |  |
Authorized Share Repurchases | 1,000 |  |  |  |  |
November 2011 [Member] |  |  |  |  |  |
Repurchase Of Shares Of The Company's Common Stock [Line Items] |  |  |  |  |  |
Shares Repurchased (in shares) | 11,035,000 |  | 0 |  | 0 |
Dollar Value of Shares Repurchased | 750 |  | 0 |  | 0 |
Expiration Date Of Share Repurchase Authorization | May 2014 |  |  |  |  |
January 2011 [Member] |  |  |  |  |  |
Repurchase Of Shares Of The Company's Common Stock [Line Items] |  |  |  |  |  |
Shares Repurchased (in shares) | 2,787,000 |  | 10,864,000 |  | 0 |
Dollar Value of Shares Repurchased | 188 |  | 562 |  | 0 |
March 2010 [Member] |  |  |  |  |  |
Repurchase Of Shares Of The Company's Common Stock [Line Items] |  |  |  |  |  |
Shares Repurchased (in shares) | 0 |  | 3,441,000 |  | 2,161,000 |
Dollar Value of Shares Repurchased | 0 |  | 171 |  | 107 |
September 2009 [Member] |  |  |  |  |  |
Repurchase Of Shares Of The Company's Common Stock [Line Items] |  |  |  |  |  |
Shares Repurchased (in shares) | 0 |  | 0 |  | 7,598,000 |
Dollar Value of Shares Repurchased | $ 0 |  | $ 0 |  | $ 283 |
[1] | 2012 amount includes the effect of $20 million in share repurchases (0.3 million shares) with trade dates prior to December 29, 2012 but with settlement dates subsequent to December 29, 2012.
[2] | 2011 amount excludes and 2010 amount includes the effect of $19 million in share repurchases (0.4 million shares) with trade dates prior to the 2010 fiscal year end but cash settlement dates subsequent to the 2010 fiscal year.

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