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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014
Property, Plant and Equipment [Line Items] |  |
Number of days past due to reach non accrual status | 90 days |
Debt issuance costs included in other assets | $ 432 | $ 483
Current deferred income taxes assets | 1,175 | 1,143
Noncurrent deferred income tax liabilities | 5,663 | 6,088
Accounting Standards Update 2015-03 [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Debt issuance costs included in other assets | 72 | $ 83
Accounting Standards Update 2015-17 [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Current deferred income taxes assets | 1,200 |
Noncurrent deferred income tax liabilities | 1,000 |
Noncurrent deferred income tax assets | $ 200 |
Maximum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Definite-lived intangible assets useful life maximum, years | 25 years |
Maximum [Member] | Machinery and Equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Useful life of property, plant and equipment | 25 years |
Maximum [Member] | Building and Building Improvements [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Useful life of property, plant and equipment | 50 years |

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