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Supplemental Cash Flow Information (Details) - USD ($)
$ 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
Supplemental Cash Flow Elements [Abstract]            
Net income (loss) $ 317.8 $ 64.0 $ (2,165.5) $ 383.9 $ 381.8 $ (1,781.6)
Depreciation and amortization         78.7 73.5
Reduction in the carrying amount of right-of-use assets         20.1 20.9
Share-based Compensation         27.2 30.3
Payments of operating lease liabilities         (22.7) (21.4)
Decrease in accounts receivable         11.5 33.0
Decrease (increase) in inventories         3.7 (31.2)
Increase in other current assets         14.3 (31.0)
Decrease in accounts payable and other current liabilities         34.5 (26.6)
Increase in income taxes payable         (12.5) 5.6
Increase in deferred income taxes         68.7 (575.1)
Increase in other long term liabilities         0.5 (0.2)
Other         6.8 (2.0)
Net cash provided by operating activities         246.4 167.4
Noncash or Part Noncash Acquisition, Fixed Assets Acquired         4.7 7.8
Noncash or Part Noncash Acquisition, Investments Acquired         2.4 $ 2.2
Noncash or Part Noncash Acquisition, Accounts Receivable Acquired     $ 9.8   $ 0.0