v3.25.2
SHAREHOLDERS' EQUITY, Schedule of Accumulated Other Comprehensive (Loss) Income (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance beginning of period     $ 11,667  
OCI:        
Balance end of period $ 12,261 $ 11,190 12,261 $ 11,190
Accumulated other comprehensive (loss) income        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance beginning of period (546) (724) (502) (971)
OCI:        
OCI before reclassifications and taxes 115 20 94 362
Amounts reclassified from AOCI, before tax (4) (7) (14) (26)
Pre-tax net OCI 111 13 80 336
Income tax effect (3) (6) (16) (82)
Total other comprehensive income/(loss), net of tax 108 7 64 254
Balance end of period (438) (717) (438) (717)
Subtotal: net investment hedges and currency translations        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance beginning of period (58) (55) (24) (73)
OCI:        
OCI before reclassifications and taxes 44 2 29 20
Amounts reclassified from AOCI, before tax 0 0 0 0
Pre-tax net OCI 44 2 29 20
Income tax effect 14 (4) (5) (4)
Total other comprehensive income/(loss), net of tax 58 (2) 24 16
Balance end of period 0 (57) 0 (57)
Net investment hedges        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance beginning of period 205 143 145 143
OCI:        
OCI before reclassifications and taxes (60) 14 19 14
Amounts reclassified from AOCI, before tax 0 0 0 0
Pre-tax net OCI (60) 14 19 14
Income tax effect 14 (4) (5) (4)
Total other comprehensive income/(loss), net of tax (46) 10 14 10
Balance end of period 159 153 159 153
Currency translations        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance beginning of period (263) (198) (169) (216)
OCI:        
OCI before reclassifications and taxes 104 (12) 10 6
Amounts reclassified from AOCI, before tax 0 0 0 0
Pre-tax net OCI 104 (12) 10 6
Income tax effect 0 0 0 0
Total other comprehensive income/(loss), net of tax 104 (12) 10 6
Balance end of period (159) (210) (159) (210)
Available- for-sale securities        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance beginning of period (496) (698) (485) (942)
OCI:        
OCI before reclassifications and taxes 71 14 52 338
Amounts reclassified from AOCI, before tax 0 0 2 0
Pre-tax net OCI 71 14 54 338
Income tax effect (18) (3) (12) (83)
Total other comprehensive income/(loss), net of tax 53 11 42 255
Balance end of period (443) (687) (443) (687)
Cash flow hedges        
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]        
Balance beginning of period 8 29 7 44
OCI:        
OCI before reclassifications and taxes 0 4 13 4
Amounts reclassified from AOCI, before tax (4) (7) (16) (26)
Pre-tax net OCI (4) (3) (3) (22)
Income tax effect 1 1 1 5
Total other comprehensive income/(loss), net of tax (3) (2) (2) (17)
Balance end of period $ 5 $ 27 $ 5 $ 27