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Inventories, net - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Inventory Disclosure [Abstract] |  |  |
General and administrative costs included in work-in-process inventories | $ 509 | $ 529 |
General and administrative costs incurred and recorded in inventories | 3,500 | 3,300 | $ 2,700
General and administrative costs charged to cost of sales from inventories | $ 3,500 | $ 3,300 | $ 2,800

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- Definition General and administrative costs charged to cost of sales from inventories. + References No definition available. + Details
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- Definition The actual or estimated amount of general and administrative expense remaining in inventory as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of general and administrative costs charged to inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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