v3.26.1
Acquisitions - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
 9 Months Ended
Feb. 02, 2026
Jan. 02, 2025
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2025
Recognized amounts of identifiable assets acquired and liabilities assumed          
Goodwill     $ 16,515,457   $ 13,676,520
Net cash paid     $ 4,973,696 $ 4,004,220  
OneOncology          
Business Combination [Line Items]          
Cash $ 4,648,720        
Fair value of previously held equity method investment in OneOncology 1,934,224        
Estimated contingent consideration 752,141        
Settlement of a receivable resulting from a pre-existing commercial relationship 51,990        
Estimated fair value of total consideration 7,387,075        
Recognized amounts of identifiable assets acquired and liabilities assumed          
Cash and cash equivalents 58,891        
Accounts receivable 257,823        
Inventories 13,177        
Prepaid expenses and other 20,628        
Property and equipment 482,389        
Goodwill 3,873,771        
Other intangible assets 3,062,000        
Other assets 643,365        
Total assets acquired 8,412,044        
Accounts payable 14,772        
Accrued expenses and other 192,713        
Short-term debt 45,358        
Long-term debt 323,985        
Deferred income taxes 78,837        
Other liabilities 364,386        
Total liabilities assumed 1,020,051        
Net assets acquired 7,391,993        
Fair value of previously held equity method investment in OneOncology (1,934,224)        
Estimated contingent consideration (752,141)        
Settlement of a receivable resulting from a pre-existing commercial relationship (51,990)        
Noncontrolling interest (4,918)        
Cash acquired (58,891)        
Net cash paid $ 4,589,829        
RCA          
Business Combination [Line Items]          
Cash   $ 4,042,007      
Estimated contingent consideration   1,087,450      
Settlement of a receivable resulting from a pre-existing commercial relationship   545,738      
Estimated fair value of total consideration   5,675,195      
Recognized amounts of identifiable assets acquired and liabilities assumed          
Cash and cash equivalents   143,312      
Accounts receivable   450,744      
Inventories   110,564      
Prepaid expenses and other   12,866      
Property and equipment   173,098      
Goodwill   4,780,042      
Other intangible assets   178,000      
Deferred income taxes   40,903      
Other assets   182,307      
Total assets acquired   6,071,836      
Accounts payable   72,385      
Accrued expenses and other   163,499      
Accrued income taxes   4,258      
Other liabilities   156,164      
Total liabilities assumed   396,306      
Net assets acquired   5,675,530      
Estimated contingent consideration   (1,087,450)      
Settlement of a receivable resulting from a pre-existing commercial relationship   (545,738)      
Noncontrolling interest   (335)      
Cash acquired   (143,312)      
Net cash paid   $ 3,898,695