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Equity - Schedule of stock based compensation expense (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Share-based compensation expense |  |  |
Pre-tax compensation expense | $ 37 | $ 33 | $ 29
Income tax benefit | (3) | (3) | (2)
Total share-based compensation expense, net of income taxes | $ 34 | 30 | 27
Share-based Payment Arrangement, Disclosure [Abstract] |  |  |
Shares authorized under Stock Incentive Plan (in shares) | 5.4 |  |
Shares available for future grants under Stock Incentive Plan (in shares) | 5.1 |  |
Stock options |  |  |
Share-based compensation expense |  |  |
Pre-tax compensation expense | $ 5 | 4 | 4
Income tax benefit | 0 | 0 | 0
Total share-based compensation expense, net of income taxes | 5 | 4 | 4
RSUs | Employee |  |  |
Share-based compensation expense |  |  |
Pre-tax compensation expense | 18 | 15 | 13
Income tax benefit | (2) | (2) | (1)
Total share-based compensation expense, net of income taxes | 16 | 13 | 12
Performance shares and other share-based awards |  |  |
Share-based compensation expense |  |  |
Pre-tax compensation expense | 14 | 14 | 12
Income tax benefit | (1) | (1) | (1)
Total share-based compensation expense, net of income taxes | $ 13 | $ 13 | $ 11

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Amount of tax benefit for recognition of expense of award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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