v3.26.1
Acquisitions and Dispositions (Allocation of Acquisition Costs) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Business Combination [Line Items]        
Cash $ 132 $ 86    
Estimated fair value of deferred/contingent purchase consideration 49 47    
Total consideration 181 148    
Allocation of purchase price:        
Goodwill 24,352 $ 23,919 $ 24,337 $ 23,306
Current Fiscal Period Acquisitions        
Business Combination [Line Items]        
Cash 132      
Estimated fair value of deferred/contingent purchase consideration 49      
Total consideration 181      
Allocation of purchase price:        
Cash and cash equivalents 2      
Cash and cash equivalents held in a fiduciary capacity 1      
Net receivables 11      
Goodwill 132      
Other intangible assets 51      
Other assets 1      
Total assets acquired 198      
Current liabilities 12      
Fiduciary liabilities 1      
Other liabilities 4      
Total liabilities assumed 17      
Net assets acquired $ 181