v3.26.3
Operations and summary of significant accounting policies (Details)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 04, 2026
€ / shares
shares
Sep. 30, 2026
USD ($)
Sep. 30, 2026
USD ($)
segment
Sep. 30, 2026
€ / shares
shares
Jun. 03, 2026
shares
Dec. 31, 2025
€ / shares
shares
Schedule of Equity Method Investments [Line Items]            
Number of operating segments | segment     2      
Common stock, outstanding (in shares)       750,000,000 25,000 750,000,000
Common stock, par value (in EUR per share) | € / shares € 0.04     € 0.04   € 0.04
Loss from equity method investments | $   $ 1.1 $ 1.9      
Common stock            
Schedule of Equity Method Investments [Line Items]            
New shares issued during period (in shares) 749,975,000          
Nordic LuxCo            
Schedule of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage       24.90%