Common shares - Summary of Common Shares (Detail) - shares shares in Thousands	Sep. 30, 2026	Dec. 31, 2025
Equity [Abstract]
Authorized (in shares)	1,100,000	1,100,000
CommonStockSharesIssuedNotDisclosed	true
Common shares outstanding (in shares)	472,012	483,593

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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+ Details