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Summary of Significant Accounting Policies (Details)
$ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
segment
Customer
Institution
Dec. 31, 2023
USD ($)
Customer
Dec. 31, 2022
Customer
Properties and Equipment      
Number of operating segments | segment 1    
Number of financial institutions | Institution 6    
Restricted cash | $ $ 239 $ 9  
Sales Revenue, Net | Customer      
Properties and Equipment      
Number of customers | Customer 2 2 2
Sales Revenue, Net | Customer | Customer One      
Properties and Equipment      
Percentage of total sales 21.00% 19.00% 13.00%
Sales Revenue, Net | Customer | Customer Two      
Properties and Equipment      
Percentage of total sales 19.00% 17.00% 11.00%
Minimum      
Properties and Equipment      
Estimated useful life 3 years    
Maximum      
Properties and Equipment      
Estimated useful life 30 years