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Stockholders' Equity - Summary of Reconciliation of Controlling Interest due to Different Currencies (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure Detail Of Reconciliation Of Controlling Interest Due To Different Currencies Line Items [Line Items] |  |
Common stock and additional paid-in capital | $ 7,893 | $ 10,424
Other equity reserves | (2,453) | (2,724)
Retained earnings | 2,635 | 1,621
Total controlling interest | 8,075 | $ 9,321
Parent [member] |  |
Disclosure Detail Of Reconciliation Of Controlling Interest Due To Different Currencies Line Items [Line Items] |  |
Common stock and additional paid-in capital | 5,403 |
Other equity reserves | 974 |
Retained earnings | 1,698 |
Total controlling interest | 8,075 |
Consolidated One [member] |  |
Disclosure Detail Of Reconciliation Of Controlling Interest Due To Different Currencies Line Items [Line Items] |  |
Common stock and additional paid-in capital | 7,893 |
Other equity reserves | (2,453) |
Retained earnings | 2,635 |
Total controlling interest | $ 8,075 |

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