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Stockholders' Equity (Details 4) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Changes to accumulated other comprehensive income (loss)        
Beginning balance   $ 7,592.0 $ 8,373.0 $ 7,853.0
Settlement loss $ 1.0      
Ending balance 7,775.0 7,775.0 7,592.0 8,373.0
Foreign Currency Translation Adjustment        
Changes to accumulated other comprehensive income (loss)        
Beginning balance   (221.0) (146.0) (179.0)
Gain (loss) arising during period   0.0 0.0 0.0
Reclassification to earnings(1)   0.0   0.0
Effect of exchange rate changes and deferred taxes   70.0 (75.0) 33.0
Ending balance (151.0) (151.0) (221.0) (146.0)
Unrealized Gain (Loss) on Derivatives        
Changes to accumulated other comprehensive income (loss)        
Beginning balance   3.0 3.0 3.0
Gain (loss) arising during period   0.0 0.0 0.0
Reclassification to earnings(1)   0.0   0.0
Effect of exchange rate changes and deferred taxes   0.0 0.0 0.0
Ending balance 3.0 3.0 3.0 3.0
Defined Benefit Plans        
Changes to accumulated other comprehensive income (loss)        
Beginning balance   (62.0) (66.0) (54.0)
Gain (loss) arising during period   27.0 (4.0) 6.0
Reclassification to earnings(1)   1.0   (1.0)
Effect of exchange rate changes and deferred taxes   1.0 0.0 (5.0)
Ending balance (87.0) (87.0) (62.0) (66.0)
Accumulated Other Comprehensive Loss        
Changes to accumulated other comprehensive income (loss)        
Beginning balance   (280.0) (209.0) (230.0)
Gain (loss) arising during period   27.0 (4.0) 6.0
Reclassification to earnings(1)   1.0   (1.0)
Effect of exchange rate changes and deferred taxes   71.0 (75.0) 28.0
Ending balance $ (235.0) $ (235.0) $ (280.0) $ (209.0)