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Intangible assets, net - Summary of intangible assets (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets, gross $ 2,030 $ 1,671
Accumulated amortization (819) (630)
Total intangible assets, net 1,211 1,041
Marketing-related    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets, gross 337 310
Customer-related    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets, gross 1,394 1,260
Contract-based    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets, gross 110 101
Software costs    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets, gross 126 0
IT projects in progress    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets, gross $ 63 $ 0