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General and Summary of Significant Accounting Policies New Accounting Pronouncements Adopted (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 02, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Effect of Change in Accounting Principle, Net of Taxes |  | $ 1,036 | $ (933) | $ (773)
Accounting Standard Update 2015-02 [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
New Accounting Pronouncement, Transition Guidance Not Significant or Not Practical |  |  | 0 |
Other Current Assets [Member] | Accounting Standard Update 2015-03 [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  |  | $ 24 |
Other Noncurrent Assets [Member] | Accounting Standard Update 2015-03 [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  |  | 357 |
Property, Plant and Equipment [Member] | Accounting Standard Update 2016-19 [Member] [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  |  | 469 |
Accumulated Amortization on PP&E [Member] | Accounting Standard Update 2016-19 [Member] [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  |  | 388 |
Construction in Progress [Member] | Accounting Standard Update 2016-19 [Member] [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  |  | $ 52 |
Subsequent Event [Member] | Accounting Standard Update 2016-09 [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | $ 30 |  |  |

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