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Borrowings (Detail) (USD $)
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12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||||||||||
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Dec. 29, 2012
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Dec. 31, 2011
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Dec. 29, 2012
2005 Junior Subordinated Convertible Debentures Due 2035 At 2.95% [Member]
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Dec. 31, 2011
2005 Junior Subordinated Convertible Debentures Due 2035 At 2.95% [Member]
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Dec. 16, 2005
2005 Junior Subordinated Convertible Debentures Due 2035 At 2.95% [Member]
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Dec. 29, 2012
2009 Junior Subordinated Convertible Debentures Due 2039 At 3.25% [Member]
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Dec. 31, 2011
2009 Junior Subordinated Convertible Debentures Due 2039 At 3.25% [Member]
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Jul. 27, 2009
2009 Junior Subordinated Convertible Debentures Due 2039 At 3.25% [Member]
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Dec. 29, 2012
2012 Senior notes due 2017 at 1.35% [Member]
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Dec. 31, 2011
2012 Senior notes due 2017 at 1.35% [Member]
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Dec. 29, 2012
2012 Senior notes due 2022 at 2.70% [Member]
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Dec. 31, 2011
2012 Senior notes due 2022 at 2.70% [Member]
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Dec. 29, 2012
2012 Senior notes due 2032 at 4.00% [Member]
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Dec. 31, 2011
2012 Senior notes due 2032 at 4.00% [Member]
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Dec. 29, 2012
2012 Senior notes due 2042 at 4.25% [Member]
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Dec. 31, 2011
2012 Senior notes due 2042 at 4.25% [Member]
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Dec. 29, 2012
2012 Senior Notes [Member]
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Sep. 19, 2011
2011 Senior Notes [Member]
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Dec. 29, 2012
2011 Senior Notes Due October 1, 2016 At 1.95% [Member]
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Dec. 31, 2011
2011 Senior Notes Due October 1, 2016 At 1.95% [Member]
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Dec. 29, 2012
2011 Senior Notes Due October 1, 2021 At 3.30% [Member]
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Dec. 31, 2011
2011 Senior Notes Due October 1, 2021 At 3.30% [Member]
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Dec. 29, 2012
2011 Senior Notes Due October 1, 2041 At 4.80% [Member]
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Dec. 31, 2011
2011 Senior Notes Due October 1, 2041 At 4.80% [Member]
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Dec. 29, 2012
2007 Arizona Bonds Due 2037 At 5.3% [Member]
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Dec. 31, 2011
2007 Arizona Bonds Due 2037 At 5.3% [Member]
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Dec. 06, 2007
2007 Arizona Bonds Due 2037 At 5.3% [Member]
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| Debt Instrument [Line Items] | |||||||||||||||||||||||||||
| Debt Instrument, Maturity Date | Dec. 15, 2035 | Aug. 01, 2039 | Dec. 15, 2017 | Dec. 15, 2022 | Dec. 15, 2032 | Dec. 15, 2042 | Oct. 01, 2016 | Oct. 01, 2021 | Oct. 01, 2041 | Dec. 01, 2037 | |||||||||||||||||
| Debt Instrument, Face Amount | $ 1,600,000,000 | $ 2,000,000,000 | $ 6,200,000,000 | $ 5,000,000,000 | $ 125,000,000 | ||||||||||||||||||||||
| Net debt carrying amount | 932,000,000 | 919,000,000 | 1,063,000,000 | 1,052,000,000 | 2,997,000,000 | 0 | 1,494,000,000 | 0 | 743,000,000 | 0 | 924,000,000 | 0 | 1,498,000,000 | 1,498,000,000 | 1,996,000,000 | 1,995,000,000 | 1,489,000,000 | 1,489,000,000 | 0 | 131,000,000 | |||||||
| Annual coupon interest rate | 2.95% | 3.25% | 1.35% | 2.70% | 4.00% | 4.25% | 1.95% | 3.30% | 4.80% | 5.30% | |||||||||||||||||
| Principal Amount Per Debenture Used In Conversion Rate | 1,000 | 1,000 | |||||||||||||||||||||||||
| Conversion rate (shares of common stock per $1,000 principal amount of debentures) | 33.86 | 32.94 | 45.05 | 44.55 | |||||||||||||||||||||||
| Effective conversion price (per share of common stock) | $ 29.53 | $ 30.36 | $ 22.20 | $ 22.45 | |||||||||||||||||||||||
| Conversion Rate Adjustments, Quarterly Dividend Distributions Excess Per Share | $ 0.10 | $ 0.14 | |||||||||||||||||||||||||
| Annual effective interest rate | 6.45% | 7.20% | |||||||||||||||||||||||||
| Maximum Amount Of Contingent Interest That Will Accrue Per Year (in decimal ratio) | 0.40% | 0.50% | |||||||||||||||||||||||||
| Embedded Derivative, Fair Value of Embedded Derivative Liability | 0 | 0 | 6,000,000 | 10,000,000 | |||||||||||||||||||||||
| Company Stock As Percentage Of Conversion Price, Surrender For Conversion | 130.00% | ||||||||||||||||||||||||||
| Company Stock As Percentage Of Conversion Price, Redemption Of Principal | 130.00% | 150.00% | |||||||||||||||||||||||||
| Trading Days During 30 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 | ||||||||||||||||||||||||||
| Trading Days During 30 Day Period In Which Company Stock Has Been At Least 130% Of Conversion Price, Redemption Of Principal | 20 days | ||||||||||||||||||||||||||
| Trading Days During 30 Day Period In Which Company Stock Has Been At Least 150% Of Conversion Price, Redemption Of Principal | 20 days | ||||||||||||||||||||||||||
| Trading Day Period Prior To Notice of Redemption Date, Redemption Of Principal | 30 days | 30 days | |||||||||||||||||||||||||
| Outstanding principal | 14,775,000,000 | 1,600,000,000 | 1,600,000,000 | 2,000,000,000 | 2,000,000,000 | ||||||||||||||||||||||
| Equity component carrying amount | 466,000,000 | 466,000,000 | 613,000,000 | 613,000,000 | |||||||||||||||||||||||
| Unamortized discount | 656,000,000 | 669,000,000 | 922,000,000 | 933,000,000 | |||||||||||||||||||||||
| Debt Instrument, Convertible, Remaining Discount Amortization Period (in years) | 23 years | 27 years | |||||||||||||||||||||||||
| Total long-term debt | 13,136,000,000 | 7,084,000,000 | |||||||||||||||||||||||||
| Year Payable, 2013 | 0 | ||||||||||||||||||||||||||
| Year Payable, 2014 | 0 | ||||||||||||||||||||||||||
| Year Payable, 2015 | 0 | ||||||||||||||||||||||||||
| Year Payable, 2016 | 1,500,000,000 | ||||||||||||||||||||||||||
| Year Payable, 2017 | 3,000,000,000 | ||||||||||||||||||||||||||
| Year Payable, 2018 and thereafter | 10,275,000,000 | ||||||||||||||||||||||||||
| Maximum Borrowings, Commercial Paper Program | 500,000,000 | 1,400,000,000 | |||||||||||||||||||||||||
| Bank Overdrafts | 264,000,000 | 47,000,000 | |||||||||||||||||||||||||
| Board Of Directors Maximum Borrowing Capacity Authorization | 3,000,000,000 | ||||||||||||||||||||||||||
| Short-term Bank Loans and Notes Payable | 48,000,000 | ||||||||||||||||||||||||||
| Commercial Paper | $ 200,000,000 | ||||||||||||||||||||||||||