v3.26.1
TAXES (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Income Tax Disclosure [Abstract]        
Income taxes $ 175 $ 199 $ 344 $ 382
Effective income tax rate 22.00% 32.00% 22.00% 27.00%
Effective income tax rate, increase (decrease) due to tax deduction, percent 1.00%     1.00%
Income tax benefit related to discrete tax items   $ (49)    
Income taxes benefit related to discrete tax items (in dollars per share)   $ 0.09    
Income tax (expense) benefit related to business combinations, as a percent 0.10     0.05
Income tax (expense) benefit related to discrete tax items, as a percent 2.00%   2.00%