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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Operating Loss Carryforwards [Line Items] |  |  |  |
Income tax expense | $ 534 | $ 877 | $ 1,321 | $ 1,534
Tax expense, entities included in effective tax rate calculation | 621 | $ 1,200 | 1,500 | $ 2,000
Net deferred tax assets | 31,800 |  | 31,800 |
U.S. [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss and tax credit carryforwards subject to expiration | 8,700 |  | 8,700 |
Non-US [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss and tax credit carryforwards subject to expiration | 1,300 |  | 1,300 |
Operating loss and tax credit carryforward deferred tax assets | 4,900 |  | 4,900 |
Operating loss and tax credit carryforwards not subject to expiration | $ 3,600 |  | $ 3,600 |

X
- Definition The sum of the tax effects as of the balance sheet date of the amount of excesses of ordinary or capital tax deductions over income and excess tax credits in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax assets. + References No definition available. + Details
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- Definition The sum of the tax effects as of the balance sheet date of the amount of excesses of ordinary or capital tax deductions over income and excess tax credits in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year not subject to expiration, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset. + References No definition available. + Details
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- Definition The sum of the tax effects as of the balance sheet date of the amount of excesses of ordinary or capital tax deductions over income and excess tax credits in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year subject to expiration, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset. + References No definition available. + Details
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- Definition Tax expense (benefit) from entities included in the effective tax rate calculation, prior to other adjustments (i.e., audit settlements). + References No definition available. + Details
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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