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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock, Common [Member]
Beginning Balance at Dec. 31, 2021 $ 3,233.2 $ 292.8 $ 310.3 $ 5,366.0 $ (68.2) $ (2,667.7)
Beginning Balance (in shares) at Dec. 31, 2021   292.8       (50.3)
Net Income (Loss) 413.9 $ 0.0 0.0 413.9 0.0 $ 0.0
Other comprehensive income (loss) 38.9 0.0 0.0 0.0 38.9 0.0
Cash dividends (255.0) 0.0 0.0 (255.0) 0.0 0.0
Stock purchases 0.0 $ 0.0 20.0 0.0 0.0 $ (20.0)
Stock purchases (in shares)   0.0       (0.2)
Stock based compensation expense and stock option plan transactions 58.9 $ 0.9 35.9 (0.3) 0.0 $ 22.4
Stock based compensation expense and stock option plan transactions (in shares)   0.9       0.7
Ending Balance at Dec. 31, 2022 3,489.9 $ 293.7 366.2 5,524.6 (29.3) $ (2,665.3)
Ending Balance (in shares) at Dec. 31, 2022   293.7       (49.8)
Net Income (Loss) 755.6 $ 0.0 0.0 755.6 0.0 $ 0.0
Other comprehensive income (loss) 2.1 0.0 0.0 0.0 2.1 0.0
Cash dividends (266.5) 0.0 0.0 (266.5) 0.0 0.0
Stock purchases (300.1) $ 0.0 0.0 0.0 0.0 $ (300.1)
Stock purchases (in shares)   0.0       (3.3)
Stock based compensation expense and stock option plan transactions 174.4 $ 0.0 88.6 (1.4) 0.0 $ 87.2
Stock based compensation expense and stock option plan transactions (in shares)   0.0       2.5
Ending Balance at Dec. 31, 2023 3,855.4 $ 293.7 454.8 6,012.3 (27.2) $ (2,878.2)
Ending Balance (in shares) at Dec. 31, 2023   293.7       (50.6)
Net Income (Loss) 585.3 $ 0.0 0.0 585.3 0.0 $ 0.0
Other comprehensive income (loss) (3.7) 0.0 0.0 0.0 (3.7) 0.0
Cash dividends (277.0) 0.0 0.0 (277.0) 0.0 0.0
Stock based compensation expense and stock option plan transactions 200.8 $ 0.0 108.3 (0.9) 0.0 $ 93.4
Stock based compensation expense and stock option plan transactions (in shares)   0.0       2.8
Ending Balance at Dec. 31, 2024 $ 4,360.8 $ 293.7 $ 563.1 $ 6,319.7 $ (30.9) $ (2,784.8)
Ending Balance (in shares) at Dec. 31, 2024   293.7       (47.8)