v3.26.1
FAIR VALUE, Changes in Fair Value for Level 3 Assets (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Trading assets        
Changes in Level 3 recurring fair value measurements, assets [Roll Forward]        
Fair value beginning of period $ 4 $ 2 $ 4 $ 3
Total gains/(losses) included in earnings 0 1 1 1
Purchases and contributions 25 21 50 39
Sales and distributions (27) (23) (53) (42)
Transfers:        
Into Level 3 0 0 0 0
Out of Level 3 0 0 0 0
Fair value end of period 2 1 2 1
Unrealized gains/(losses) for the period included in earnings for instruments held at the end of the reporting period 0 0 0 0
Derivative assets        
Changes in Level 3 recurring fair value measurements, assets [Roll Forward]        
Fair value beginning of period 0 0 0 4
Total gains/(losses) included in earnings 1 6 2 2
Purchases and contributions 0 0 0 0
Sales and distributions (1) 0 (2) 0
Transfers:        
Into Level 3 0 0 0 0
Out of Level 3 0 0 0 0
Fair value end of period 0 6 0 6
Unrealized gains/(losses) for the period included in earnings for instruments held at the end of the reporting period 0 8 0 2
Other investments        
Changes in Level 3 recurring fair value measurements, assets [Roll Forward]        
Fair value beginning of period 7 7 7 7
Total gains/(losses) included in earnings 0 0 0 0
Purchases and contributions 0 0 0 0
Sales and distributions 0 0 0 0
Transfers:        
Into Level 3 0 0 0 0
Out of Level 3 0 0 0 0
Fair value end of period 7 7 7 7
Unrealized gains/(losses) for the period included in earnings for instruments held at the end of the reporting period $ 0 $ 0 $ 0 $ 0