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Capital Stock - Dividends Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Equity [Abstract] |  |  |  |  |  |
Base (in dollars per share) | $ 0.22 | $ 0.22 | $ 0.21 | $ 0.21 | $ 0.44 | $ 0.42
Total dividends | $ 170 | $ 170 | $ 158 | $ 160 | $ 340 | $ 318

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