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Significant Accounting Policies - Summary of impact of the revision on net revenues and cost of sales in the consolidated statement of income (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ 4,468 | $ 4,093 | $ 4,177 | $ 4,149 | $ 4,419 | $ 4,385 | $ 4,552 | $ 4,916 | $ 16,887 | $ 18,271 | $ 21,853
Net revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  | 18,271 | 21,853
Cost of sales [Member] |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  | 9,975 | 11,237
As reported [Member] |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  | 4,264 | 4,337 | 4,295 | 4,559 | 4,529 | 4,701 | 5,065 |  |  |
As reported [Member] | Net revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  | 18,854 | 22,385
As reported [Member] | Cost of sales [Member] |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  | 10,558 | 11,770
Restatement adjustment [Member] |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  | $ (171) | $ (159) | $ (146) | $ (141) | $ (143) | $ (150) | $ (149) |  |  |
Restatement adjustment [Member] | Net revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  | (583) | (533)
Restatement adjustment [Member] | Cost of sales [Member] |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  | $ (583) | $ (533)

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