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Stock Based Compensation - Summary of Stock Option and Stock Appreciation Rights ("SARs") Restricted Stock Units ("RSUs") and Performance Stock Units ("PSU") Activity (Detail) shares in Millions | 9 Months Ended
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Sep. 30, 2024 shares
Stock Options and SARs |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of Shares, Outstanding Opening | 38.8
Granted | 1.8
Cancelled/forfeited | (1.4)
Exercised | (6.0)
Vested | 0.0
Number of Shares, Outstanding Closing | 33.2
PSUs and RSUs |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Granted | 3.4
Number of Shares, Outstanding Opening | 3.5
Cancelled/forfeited | (1.0)
Exercised | 0.0
Vested | (0.8)
Number of Shares, Outstanding Closing | 5.1

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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