Restructuring expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Restructuring expenses (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 2	$ 25	$ 4	$ 76
Severance costs				45
Non-cash branch and facility costs				27
Corporate restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	2	4	4	4
Business restructuring expenses
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 0	$ 21	$ 0	$ 72

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details