v3.26.3
Basis of presentation (Details)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2027
USD ($)
Sep. 30, 2026
USD ($)
$ / $
Sep. 30, 2026
USD ($)
segment
$ / $
Sep. 30, 2025
USD ($)
$ / $
Jul. 01, 2026
Dec. 31, 2025
USD ($)
$ / $
Dec. 31, 2024
$ / $
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Number of operating segments | segment     4        
Net monetary assets   $ 3,222.1 $ 3,222.1     $ 3,329.0  
Cash and cash equivalents   1,563.2 1,563.2     1,725.9  
Goodwill   1,493.7 1,493.7     $ 1,515.3  
Malaysia deconsolidation gain (loss)     (8.9) $ 0.0      
Malaysia deconsolidation receivables writeoff     11.5        
Malaysia investment              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Malaysia equity method investment ownership percentage         48.88%    
Malaysia deconsolidation gain (loss)   (8.9) (8.9)        
Malaysia deconsolidation receivables writeoff   6.5 6.5        
Malaysia deconsolidation gain on revaluation of retained investment   51.4 51.4        
Location, Statement of Income, Balance [Axis]: us-gaap:NonoperatingIncomeExpense | Malaysia investment              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Malaysia deconsolidation gain (loss)   (25.0) (25.0)        
Location, Statement of Income, Balance [Axis]: us-gaap:OtherOperatingIncomeExpenseNet | Malaysia investment              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Malaysia deconsolidation gain (loss)   16.1 16.1        
NCR Atleos              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Transaction costs   57.3 57.3        
NCR Atleos | Forecast              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Estimated purchase price consideration $ 4,000.0            
G4S              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Contingent consideration derecognition gain     22.0        
G4S | Malaysia investment              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Contingent consideration derecognition gain   $ 22.0 $ 22.0        
Argentina, Pesos | Argentina              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Percent of consolidated revenue     3.00% 3.00%      
Rate change   (5.00%) (5.00%) (25.00%)   (29.00%)  
Official exchange rate | $ / $   1,520.2 1,520.2 1,379.7   1,451.6 1,031
Currency remeasurement gain (loss)     $ (1.6) $ (16.2)      
Net monetary assets   $ 27.9 27.9     $ 23.4  
Cash and cash equivalents   24.8 24.8     24.9  
Nonmonetary assets   131.8 131.8     140.7  
Goodwill   102.5 102.5     102.5  
Debt securities   $ 3.8 $ 3.8     $ 7.7