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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) segment | Dec. 31, 2019 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |
Number of reportable segments (in segments) | segment |  |  | 5 |
Asset impairment charges |  | $ 1,500 |  |
Reserve for doubtful accounts | $ 37 |  | $ 37 | $ 29
Sale of accounts receivable | $ 300 | $ 300 |  |
Increase in sale of accounts receivable |  |  | $ 100 |

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