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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Maturity period of investments description |  | Three months or less |  |
Minimum derivative financial instrument's term (months) |  | 2 months |  |
Maximum derivative financial instrument's term (months) |  | 24 months |  |
Allowances for excess and obsolete inventories |  | $ 396 | $ 338 |
Depreciation expense related to property, plant and equipment |  | 392 | 323 | 279
Impairment of long-lived assets |  | 0 | 0 | 0
Goodwill |  | 9,049 | 7,172 | 6,151
Indefinite-lived intangible assets |  | 5,055 | 4,743 |
Estimated useful lives of intangible assets, minimum |  | 2 years |  |
Estimated useful lives of intangible assets, maximum |  | 30 years |  |
Amortization expense |  | 360 |  |
Number of years as first period of amortization |  | 5 years |  |
Net foreign currency transaction gains (losses) |  | 26 | 21 | 10
Net investment in Venezuela |  | 39 |  |
Devaluation charges | 12 |  |  |
Net allowances for doubtful accounts |  | 132 | 120 |
Compensation cost charged against income for share-based compensation arrangements |  | 92 | 80 | 73
Income tax benefit recognized for share-based compensation arrangements |  | 28 | 24 | 17
Anti-dilutive stock options outstanding |  | 7 | 5 | 3
Indefinite-lived trade names [Member] |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Indefinite-lived intangible assets |  | $ 643 |  |

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