XML 43 R31.htm IDEA: XBRL DOCUMENT v3.26.1
Charges and Credits - Summary of Charges and Credits (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Charges And Credits [Line Items]    
Charges and credits, Pretax Charge   $ 206
Charges and credits, Tax Benefit   11
Charges and credits, Noncontrolling Interests   4
Charges and credits, Net   191
Interest And Other | Workforce Reductions    
Charges And Credits [Line Items]    
Charges and credits, Pretax Charge   158
Charges and credits, Tax Benefit   10
Charges and credits, Net   148
Interest And Other | Merger and Integration    
Charges And Credits [Line Items]    
Charges and credits, Pretax Charge $ 41 48
Charges and credits, Tax Benefit 8 1
Charges and credits, Noncontrolling Interests 2 4
Charges and credits, Net $ 31 $ 43