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Consolidated Balance Sheet (Parenthetical) - USD ($) shares in Millions, $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Statement of Financial Position [Abstract] |  |
Deferred income tax credit carryforwards | $ 821.3 | $ 867.4
Common stock - issued shares | 218.5 | 216.7
Common stock - outstanding shares | 218.5 | 216.7

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