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Our Significant Accounting Policies (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
Property, Plant and Equipment [Line Items] |  |  |
Capitalized Computer Software, Amortization | $ 214 | $ 202 | $ 208
Capitalized Computer Software, Net | $ 791 | $ 863 |
Minimum | Software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 5 years |  |
Maximum | Software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 10 years |  |

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