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Consolidated Statements Of Stockholders' Equity (Deficit) - USD ($)
$ in Millions
Total
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Total [Member]
Common Stock Including Additional Paid in Capital
Balance at Dec. 31, 2019   $ (16,477.5) $ (2.7) $ (1,490.1) $ 14,990.1
Stock Issued During Period, Value, Employee Stock Purchase Plan         12.6
Net income $ 814.9 814.9      
Other Comprehensive Income (Loss), Net of Tax (0.1)   (0.1)    
Stock-based compensation         50.0
Repurchase of common stock         777.5
Balance at Dec. 31, 2020   (15,662.6) (2.8) (1,390.2) 14,275.2
Stock Issued During Period, Value, Employee Stock Purchase Plan         12.4
Net income 784.8 784.8      
Other Comprehensive Income (Loss), Net of Tax 0.0   0.0    
Stock-based compensation         55.1
Repurchase of common stock         722.6
Balance at Dec. 31, 2021 (1,260.5) (14,877.8) (2.8) (1,260.5) 13,620.1
Stock Issued During Period, Value, Employee Stock Purchase Plan         12.3
Net income 673.8 673.8      
Other Comprehensive Income (Loss), Net of Tax 0.1   0.1    
Stock-based compensation         60.2
Repurchase of common stock         1,048.1
Balance at Dec. 31, 2022 $ (1,562.2) $ (14,204.0) $ (2.7) $ (1,562.2) $ 12,644.5