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EARNINGS PER SHARE - Computation of Basic and Diluted EPS (two-class method) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 30, 2024
Dec. 30, 2023
Apr. 01, 2023
Mar. 30, 2024
Apr. 01, 2023
Sep. 30, 2023
Numerator for earnings per share:            
Net income $ 404   $ 304 $ 786 $ 533  
Less: Net income attributable to noncontrolling interests 1   0 1 1  
Net income attributable to TD Group 403   304 785 532  
Less: Dividends paid on participating securities (1) 0   0 (101) (38)  
Net income applicable to TD Group common stockholders—basic and diluted $ 403   $ 304 $ 684 $ 494  
Denominator for basic and diluted earnings per share under the two-class method:            
Weighted-average common shares outstanding - basic (in shares) 55.7   54.7 55.6 54.6  
Weighted-average common shares outstanding - diluted (in shares)       55.6 54.6  
Vested options deemed participating securities 2.1   2.4 2.2 2.5  
Weighted-average shares outstanding - basic (in shares) 57.8   57.1 57.8 57.1  
Weighted-average shares outstanding - diluted (in shares) 57.8   57.1 57.8 57.1  
Earnings per share - basic (in usd per share) $ 6.97   $ 5.32 $ 11.83 $ 8.65  
Earnings per share - diluted (in usd per share) $ 6.97   $ 5.32 $ 11.83 $ 8.65  
Total Payments Of Dividend Equivalents       $ 101 $ 38  
Dividend equivalent payments   $ 83       $ 18
Dividend declared (in usd per share)   $ 35.00