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Borrowings (Details) (USD $)
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9 Months Ended | 9 Months Ended | 9 Months Ended | 9 Months Ended | 9 Months Ended | 9 Months Ended | 9 Months Ended | 9 Months Ended | 9 Months Ended | 9 Months Ended | |||||||||||||||
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Sep. 27, 2014
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Sep. 28, 2013
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Dec. 28, 2013
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Sep. 27, 2014
2012 Senior notes due 2017 at 1.35% [Member]
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Dec. 28, 2013
2012 Senior notes due 2017 at 1.35% [Member]
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Sep. 27, 2014
2012 Senior notes due 2022 at 2.70% [Member]
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Dec. 28, 2013
2012 Senior notes due 2022 at 2.70% [Member]
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Sep. 27, 2014
2012 Senior notes due 2032 at 4.00% [Member]
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Dec. 28, 2013
2012 Senior notes due 2032 at 4.00% [Member]
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Sep. 27, 2014
2012 Senior notes due 2042 at 4.25% [Member]
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Dec. 28, 2013
2012 Senior notes due 2042 at 4.25% [Member]
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Sep. 27, 2014
2011 Senior notes due 2016 at 1.95% [Member]
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Dec. 28, 2013
2011 Senior notes due 2016 at 1.95% [Member]
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Sep. 27, 2014
2011 Senior notes due 2021 at 3.30% [Member]
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Dec. 28, 2013
2011 Senior notes due 2021 at 3.30% [Member]
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Sep. 27, 2014
2011 Senior notes due 2041 at 4.80% [Member]
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Dec. 28, 2013
2011 Senior notes due 2041 at 4.80% [Member]
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Sep. 27, 2014
2009 Junior subordinated convertible debentures due 2039 At 3.25% [Member]
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Dec. 28, 2013
2009 Junior subordinated convertible debentures due 2039 At 3.25% [Member]
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Dec. 26, 2009
2009 Junior subordinated convertible debentures due 2039 At 3.25% [Member]
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Sep. 27, 2014
2005 Junior subordinated convertible debentures due 2035 at 2.95% [Member]
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Dec. 28, 2013
2005 Junior subordinated convertible debentures due 2035 at 2.95% [Member]
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Dec. 31, 2005
2005 Junior subordinated convertible debentures due 2035 at 2.95% [Member]
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Dec. 29, 2012
2012 Senior Notes [Member]
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Oct. 01, 2011
2011 Senior Notes [Member]
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| Borrowings Detail [Abstract] | |||||||||||||||||||||||||
| Drafts payable | $ 79,000,000 | $ 257,000,000 | |||||||||||||||||||||||
| Notes payable | 0 | 24,000,000 | |||||||||||||||||||||||
| Short-term debt | 1,164,000,000 | 281,000,000 | |||||||||||||||||||||||
| Board Of Directors Maximum Borrowing Capacity Authorization | 3,000,000,000 | ||||||||||||||||||||||||
| Maximum Borrowings, Commercial Paper Program | 2,100,000,000 | 300,000,000 | |||||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||||||
| Debt Instrument, Face Amount | 2,000,000,000 | 1,600,000,000 | 6,200,000,000 | 5,000,000,000 | |||||||||||||||||||||
| Net debt carrying amount | 2,998,000,000 | 2,997,000,000 | 1,495,000,000 | 1,494,000,000 | 744,000,000 | 744,000,000 | 924,000,000 | 924,000,000 | 1,499,000,000 | 1,499,000,000 | 1,997,000,000 | 1,996,000,000 | 1,490,000,000 | 1,490,000,000 | 1,085,000,000 | 1,075,000,000 | 956,000,000 | 946,000,000 | |||||||
| Debt Instrument, Maturity Date | Dec. 15, 2017 | Dec. 15, 2022 | Dec. 15, 2032 | Dec. 15, 2042 | Oct. 01, 2016 | Oct. 01, 2021 | Oct. 01, 2041 | Aug. 01, 2039 | Dec. 15, 2035 | ||||||||||||||||
| Annual coupon interest rate | 1.35% | 2.70% | 4.00% | 4.25% | 1.95% | 3.30% | 4.80% | 3.25% | 2.95% | ||||||||||||||||
| Total debt | 13,188,000,000 | 13,165,000,000 | |||||||||||||||||||||||
| Current portion of long-term debt | (1,085,000,000) | 0 | (1,100,000,000) | ||||||||||||||||||||||
| Long-term debt | 12,103,000,000 | 13,165,000,000 | |||||||||||||||||||||||
| Annual effective interest rate | 7.20% | 6.45% | |||||||||||||||||||||||
| Maximum amount of contingent interest that will accrue per year | 0.50% | 0.40% | |||||||||||||||||||||||
| Embedded Derivative, Fair Value of Embedded Derivative Liability | 8,000,000 | 10,000,000 | 0 | 9,000,000 | |||||||||||||||||||||
| Company Stock As Percentage Of Conversion Price, Surrender For Conversion | 130.00% | ||||||||||||||||||||||||
| Trading Days During Thirty Day Period In Which Company Stock Has Been At Least 130% Of Conversion Price, Surrender For Conversion | 20 days | ||||||||||||||||||||||||
| Trading Day Period Ending On Last Day Of Preceeding Fiscal Quarter, Surrender for Conversion | 30 days | ||||||||||||||||||||||||
| Company Stock As Percentage Of Conversion Price, Redemption Of Principal | 150.00% | 130.00% | |||||||||||||||||||||||
| Trading Days During Thirty Day Period In Which Company Stock Has Been At Least 130% Of Conversion Price, Redemption Of Principal | 20 days | ||||||||||||||||||||||||
| Trading Day Period Prior To Notice of Redemption Date, Redemption Of Principal | 30 days | 30 days | |||||||||||||||||||||||
| Trading Days During Thirty Day Period In Which Company Stock Has Been At Least 150% Of Conversion Price, Redemption Of Principal | 20 days | ||||||||||||||||||||||||
| Outstanding principal | 2,000,000,000 | 2,000,000,000 | 1,600,000,000 | 1,600,000,000 | |||||||||||||||||||||
| Equity component (including temporary equity) carrying amount | 613,000,000 | 613,000,000 | 466,000,000 | 466,000,000 | |||||||||||||||||||||
| Unamortized discount | 915,000,000 | 925,000,000 | 644,000,000 | 654,000,000 | |||||||||||||||||||||
| Conversion rate (shares of common stock per $1,000 principal amount of debentures) | 46.06 | 45.57 | 34.95 | 34.60 | |||||||||||||||||||||
| Principal Amount Per Debenture Used In Conversion Rate | 1,000 | 1,000 | |||||||||||||||||||||||
| Effective conversion price (per share of common stock) | $ 21.71 | $ 21.94 | $ 28.61 | $ 28.90 | |||||||||||||||||||||
| Debt Instrument, Convertible, Remaining Discount Amortization Period (in years) | 25 years | 21 years | |||||||||||||||||||||||
| Conversion Rate Adjustments, Quarterly Dividend Distributions Excess Per Share | $ 0.14 | $ 0.10 | |||||||||||||||||||||||
| Temporary equity | $ 915,000,000 | $ 0 | |||||||||||||||||||||||