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Income Taxes - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Taxes [Line Items] |  |  |  |  |
Deferred tax asset, increase (decrease), amount | $ 2,000,000,000 |  |  |  |
Remeasurement of deferred tax asset |  | $ 2,000,000,000 |  |  |
Effect of change on earnings per share (in dollars per share) |  | $ 6.88 |  | $ 6.77 |
Total net state income tax expense |  |  | $ 83,000,000 | $ 103,000,000 | $ 112,000,000
Recognized tax benefit for the impact of the tax credit |  |  | 138,000,000 | 115,000,000 | 107,000,000
Excess tax benefits for share-based payment awards |  |  | (55,000,000) | (106,000,000) | (152,000,000)
Foreign derived intangible income deduction |  |  | 61,000,000 | 0 | 0
U.S. manufacturing deduction benefit |  |  | 0 | 7,000,000 | 117,000,000
Unrecognized tax benefits | $ 0 | $ 0 | 0 | 0 | 0
Federal and foreign income tax payments made, net of refunds received |  |  | $ (41,000,000) | $ 1,100,000,000 | $ 1,300,000,000
Internal Revenue Service (IRS) | Tax Year 2017 |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Tax years subject to examination |  |  | 2017 |  |
Internal Revenue Service (IRS) | Tax Year 2018 |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Tax years subject to examination |  |  | 2018 |  |
Accounting Standards Update 2016-09 | Adjustments for | Adjustments for New Accounting Principle, Early Adoption |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Excess income tax benefit from share-based compensation, operating activities |  |  | $ 61,000,000 |  |

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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to excess tax benefit for share-based compensation cost. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109196918&loc=d3e11374-113907 + Details
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