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Stockholders' Deficit (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended 10 Months Ended
Feb. 10, 2022
Sep. 30, 2022
Sep. 30, 2022
Oct. 27, 2022
Treasury Stock Repurchase Programs [Line Items]        
Additional share repurchase amount authorized $ 705.4     $ 803.0
Remaining common stock available for repurchase 294.6 $ 267.6 $ 267.6 197.0
Common stock, held in treasury   248.1 248.1  
Common stock repurchased   $ 12,540.0 $ 12,540.0  
Treasury Stock Shares Repurchased for Tax Withholding and Other     $ 0.1  
Share Buyback Program [Member]        
Treasury Stock Repurchase Programs [Line Items]        
Common stock authorized to repurchase $ 1,000.0     $ 1,000.0
Common stock repurchase, share   1.5 4.4  
Average stock price   $ 180.59 $ 186.46  
Aggregate cost of share   $ 275.5 $ 820.4  
Restricted Stock Units [Member]        
Treasury Stock Repurchase Programs [Line Items]        
Average stock price     $ 203.57  
Aggregate cost of share     $ 13.6