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Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Significant Accounting Policies [Line Items] |  |
Changes in assumptions and experience gains and losses that are greater than | 10.00% |
Sales | $ 32,647 | $ 39,431
Unbilled accounts receivable | 425 | 318
Deferred revenue | 214 | 199
Deferred revenue recognized | 81 | 91
Research and development costs | $ 830 | 640
Unrecognized income tax benefits | 50.00% |
Leases term | 12 months |
Tooling And Engineering [Member] |  |
Significant Accounting Policies [Line Items] |  |
Sales | $ 739 | 749
Accounts receivable | $ 5,100 | $ 4,500
Minimum [Member] |  |
Significant Accounting Policies [Line Items] |  |
Estimated useful lives of finite-lived intangible assets | 4 years |
Contract with customer agreement termination period | 5 years |
Payment term duration | 30 days |
Minimum [Member] | Building [Member] |  |
Significant Accounting Policies [Line Items] |  |
Annual rates of depreciation on fixed assets | 2.50% |
Minimum [Member] | General Purpose Equipment [Member] |  |
Significant Accounting Policies [Line Items] |  |
Annual rates of depreciation on fixed assets | 7.00% |
Minimum [Member] | Special Purpose Equipment [Member] |  |
Significant Accounting Policies [Line Items] |  |
Annual rates of depreciation on fixed assets | 10.00% |
Maximum [Member] |  |
Significant Accounting Policies [Line Items] |  |
Estimated useful lives of finite-lived intangible assets | 15 years |
Contract with customer agreement termination period | 7 years |
Payment term duration | 90 days |
Maximum [Member] | Building [Member] |  |
Significant Accounting Policies [Line Items] |  |
Annual rates of depreciation on fixed assets | 5.00% |
Maximum [Member] | General Purpose Equipment [Member] |  |
Significant Accounting Policies [Line Items] |  |
Annual rates of depreciation on fixed assets | 10.00% |
Maximum [Member] | Special Purpose Equipment [Member] |  |
Significant Accounting Policies [Line Items] |  |
Annual rates of depreciation on fixed assets | 33.00% |

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- Definition Assumptions of employee future benefit plans. + References No definition available. + Details
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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- Definition Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 310 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118261985&loc=d3e55302-109406 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(c)(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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