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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) segment | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |  |  |
Number of primary reportable segments (in segments) | segment |  |  |  | 5 |  |
Asset impairment charges |  | $ 1,500 | $ 12 |  | $ 12 |
Increase in sales during the period | 5.00% |  |  |  |  |
Reserve for doubtful accounts | $ 37 |  |  | $ 37 |  | $ 29
Sale of accounts receivable | $ 350 |  |  |  |  |
Increase in sale of accounts receivable |  |  |  | $ 150 |  |

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