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Unaudited Consolidated Statements of Stockholders' Equity - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Treasury Stock
Accumulated Other Comprehensive Loss, Net of Tax
Non-controlling Interests In Consolidated Subsidiary
Balance (in shares) at Dec. 31, 2020   318.8          
Balance (in shares) at Dec. 31, 2020         0.0    
Balance at beginning of period at Dec. 31, 2020 $ 8,488.8 $ 3.2 $ 2,741.4 $ 5,751.8 $ (0.1) $ (12.4) $ 4.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 296.4     295.9     0.5
Other comprehensive income 1.1         1.1  
Cash dividends declared (135.6)     (135.6)      
Issuances of common stock (in shares)   0.5     0.2    
Issuances of common stock (12.3)   2.4   $ (14.7)    
Stock-based compensation 12.6   13.5 (0.9)      
Purchase of common stock for treasury (in shares)         (0.1)    
Purchase of common stock for treasury (12.7)       $ (12.7)    
Balance (in shares) at Mar. 31, 2021   319.3          
Balance (in shares) at Mar. 31, 2021         (0.3)    
Balance at end of period at Mar. 31, 2021 8,638.3 $ 3.2 2,757.3 5,911.2 $ (27.5) (11.3) 5.4
Balance (in shares) at Dec. 31, 2020   318.8          
Balance (in shares) at Dec. 31, 2020         0.0    
Balance at beginning of period at Dec. 31, 2020 8,488.8 $ 3.2 2,741.4 5,751.8 $ (0.1) (12.4) 4.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 628.4            
Other comprehensive income 1.6            
Balance (in shares) at Jun. 30, 2021   319.4          
Balance (in shares) at Jun. 30, 2021         (0.6)    
Balance at end of period at Jun. 30, 2021 8,783.4 $ 3.2 2,787.1 6,106.0 $ (107.2) (10.8) 5.1
Balance (in shares) at Mar. 31, 2021   319.3          
Balance (in shares) at Mar. 31, 2021         (0.3)    
Balance at beginning of period at Mar. 31, 2021 8,638.3 $ 3.2 2,757.3 5,911.2 $ (27.5) (11.3) 5.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 332.0     331.1     0.9
Other comprehensive income 0.5         0.5  
Cash dividends declared (135.4)     (135.4)      
Issuances of common stock (in shares)   0.1     0.0    
Issuances of common stock 2.9   3.1   $ (0.2)    
Stock-based compensation 25.8   26.7 (0.9)      
Purchase of common stock for treasury (in shares)         (0.3)    
Purchase of common stock for treasury (79.5)       $ (79.5)    
Distributions paid (1.2)           (1.2)
Balance (in shares) at Jun. 30, 2021   319.4          
Balance (in shares) at Jun. 30, 2021         (0.6)    
Balance at end of period at Jun. 30, 2021 8,783.4 $ 3.2 2,787.1 6,106.0 $ (107.2) (10.8) 5.1
Balance (in shares) at Dec. 31, 2021   319.6          
Balance (in shares) at Dec. 31, 2021         (2.4)    
Balance at beginning of period at Dec. 31, 2021 8,979.7 $ 3.2 2,789.5 6,475.6 $ (274.8) (14.6) 0.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 351.9     352.0     (0.1)
Other comprehensive income 1.1         1.1  
Cash dividends declared (145.3)     (145.3)      
Issuances of common stock (in shares)   0.3     0.1    
Issuances of common stock (11.5)   2.6   $ (14.1)    
Stock-based compensation 12.3   13.2 (0.9)      
Purchase of common stock for treasury (in shares)         (1.6)    
Purchase of common stock for treasury (203.5)       $ (203.5)    
Balance (in shares) at Mar. 31, 2022   319.9          
Balance (in shares) at Mar. 31, 2022         (4.1)    
Balance at end of period at Mar. 31, 2022 8,984.7 $ 3.2 2,805.3 6,681.4 $ (492.4) (13.5) 0.7
Balance (in shares) at Dec. 31, 2021   319.6          
Balance (in shares) at Dec. 31, 2021         (2.4)    
Balance at beginning of period at Dec. 31, 2021 8,979.7 $ 3.2 2,789.5 6,475.6 $ (274.8) (14.6) 0.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 723.7            
Other comprehensive income 1.2            
Cash dividends declared       (290.6)      
Balance (in shares) at Jun. 30, 2022   320.1          
Balance (in shares) at Jun. 30, 2022         (4.1)    
Balance at end of period at Jun. 30, 2022 9,216.0 $ 3.2 2,818.9 6,907.1 $ (500.4) (13.4) 0.6
Balance (in shares) at Mar. 31, 2022   319.9          
Balance (in shares) at Mar. 31, 2022         (4.1)    
Balance at beginning of period at Mar. 31, 2022 8,984.7 $ 3.2 2,805.3 6,681.4 $ (492.4) (13.5) 0.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income (loss) 371.8     371.9     (0.1)
Other comprehensive income 0.1         0.1  
Cash dividends declared (145.3)     (145.3)      
Issuances of common stock (in shares)   0.2          
Issuances of common stock (4.0)   4.0   $ (8.0)    
Stock-based compensation 8.7   9.6 (0.9)      
Purchase of common stock for treasury 0.0            
Balance (in shares) at Jun. 30, 2022   320.1          
Balance (in shares) at Jun. 30, 2022         (4.1)    
Balance at end of period at Jun. 30, 2022 $ 9,216.0 $ 3.2 $ 2,818.9 $ 6,907.1 $ (500.4) $ (13.4) $ 0.6