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Equity - Additional Information (Detail) shares in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 $ / shares shares | Dec. 31, 2020 $ / shares shares | Apr. 15, 2022 shares
Disclosure of classes of share capital [line items] |  |  |
Common shares par value | $ / shares | $ 10 | $ 10 |
Shares allocated for exercise of employee stock options | 500,000,000.0 | 500,000,000.0 |
Issued capital | 25,930.3 | 25,930.3 |
Legal capital reserve percentage | 10.00% | 10.00% |
Percentage of paid in capital on reserve used to offset deficit or distribute as dividend in cash or stock | 25.00% | 25.00% |
Non Adjusting Events After Reporting Period [Member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Share buy back plan aggregate shares repurchased |  |  | 1.4
Top of range [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Total distribution | 50.00% |  |
American Depositary Shares (one represents five common shares) [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Issued capital | 1,064.2 |  |
Number of shares issued | 5,321.2 |  |

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