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Acquisitions and Investments - Additional Information (Detail) $ / shares in Units, $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 20, 2013 USD ($) $ / shares | Dec. 31, 2015 USD ($) Acquisition | Dec. 31, 2014 USD ($) Acquisition | Dec. 31, 2013 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Aggregate purchase price of acquisitions |  | $ 86 | $ 291 | $ 2,397
Goodwill |  | $ 6,980 | $ 8,539 | $ 9,049
Weighted average life |  | 5 years |  |
Other Investments [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Aggregate purchase price of acquisitions | $ 19 |  |  |
Customer Relationships [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets | $ 635 |  |  |
Weighted average life | 18 years |  |  |
Patents [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets | $ 170 |  |  |
Weighted average life | 20 years |  |  |
Trademarks [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets | $ 86 |  |  |
Weighted average life | 20 years |  |  |
Other Intangible Assets [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets | $ 3 |  |  |
Weighted average life | 1 year |  |  |
All Other Acquisitions [Member] |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Acquisitions completed | Acquisition |  | 7 | 10 |
Aggregate purchase price of acquisitions | $ 2,378 | $ 86 | $ 291 |
Intangible assets | $ 894 | 12 | 59 |
Goodwill |  | $ 56 | $ 167 |
Share holder received in cash per share | $ / shares | $ 60.00 |  |  |
Weighted average life | 19 years |  |  |

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