v3.26.1
Supplemental balance sheet and cash flow information (goodwill) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Goodwill [Line Items]    
Changes to goodwill $ 0.0  
Goodwill [Roll Forward]    
Goodwill, beginning of year 1,422.8  
Goodwill, end of period 1,422.8  
Operating segments [Member] | Merchant Services [Member]    
Goodwill [Roll Forward]    
Goodwill, beginning of year 727.7  
Goodwill, end of period 727.7  
Operating segments [Member] | B2B Payments [Member]    
Goodwill [Roll Forward]    
Goodwill, beginning of year 160.4  
Goodwill, end of period 160.4  
Operating segments [Member] | Data Solutions [Member]    
Goodwill [Roll Forward]    
Goodwill, beginning of year [1] 40.8  
Goodwill, end of period [1] 40.8  
Accumulated goodwill impairment charges (145.6) $ (145.6)
Operating segments [Member] | Print [Member]    
Goodwill [Roll Forward]    
Goodwill, beginning of year [1] 493.9  
Goodwill, end of period [1] 493.9  
Accumulated goodwill impairment charges $ (193.7) $ (193.7)
[1]
(1) The Data Solutions and Print balances are net of accumulated impairment charges of $145.6 million and $193.7 million, respectively, for each period.