Taxes on Income - Reconciliation of Gross Unrecognized Tax Benefits (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Income Tax Contingency [Line Items]
Income taxes payable	$ 1,013	$ 951
Taxes and other current assets	9,441	9,440
Taxes and other noncurrent assets	4,979	4,126
Noncurrent deferred tax liabilities	19,597	18,628
Other taxes payable	6,886	6,245
Unrecognized Tax Benefit [Member]
Income Tax Contingency [Line Items]
Income taxes payable	357	421
Taxes and other current assets	11	279
Taxes and other noncurrent assets	225	169
Noncurrent deferred tax liabilities	677	369
Other taxes payable	$ 6,000	$ 5,500

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due beyond one year or the operating cycle, whichever is longer. Alternate captions include income taxes payable, noncurrent.

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Represents the noncurrent portion of deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A noncurrent taxable temporary difference is a difference between the tax basis and the carrying amount of a noncurrent asset or liability in the financial statements prepared in accordance with generally accepted accounting principles. In a classified statement of financial position, an enterprise separates deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets are classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, are classified according to the expected reversal date of the temporary difference.

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