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Equity - Schedule of stock based compensation expense (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Share-based compensation expense |  |
Pre-tax compensation expense | $ 13 | $ 13
Income tax benefit | (1) | (1)
Total share-based compensation expense, net of income taxes | 12 | 12
Stock options |  |
Share-based compensation expense |  |
Pre-tax compensation expense | 1 | 2
Income tax benefit | 0 | 0
Total share-based compensation expense, net of income taxes | 1 | 2
RSUs | Employee |  |
Share-based compensation expense |  |
Pre-tax compensation expense | 7 | 7
Income tax benefit | (1) | (1)
Total share-based compensation expense, net of income taxes | 6 | 6
Performance shares and other share-based awards |  |
Share-based compensation expense |  |
Pre-tax compensation expense | 5 | 4
Income tax benefit | 0 | 0
Total share-based compensation expense, net of income taxes | $ 5 | $ 4

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