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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME , UTILITY (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Pension and other postretirement benefit plans obligations, tax | $ 0 | $ 0 | $ 0 | $ 0
Net unrealized gain (losses) on available for sale securities, tax | 1 | 2 | 4 | 1
Utility |  |  |  |
Pension and other postretirement benefit plans obligations, tax | 0 | 0 | 0 | 0
Net unrealized gain (losses) on available for sale securities, tax | $ 1 | $ 2 | $ 4 | $ 1

X
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