v3.26.1
Business Segment Information - Schedule of Reportable Segment Operating Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Total segment cost of goods sold $ 81,147,602 $ 77,756,417 $ 238,775,124 $ 229,079,303
Total segment operating expenses 2,284,756 1,802,007 6,325,863 5,110,545
Total segment operating income 1,120,217 867,654 3,023,259 2,610,098
Total depreciation and amortization 269,499 253,995 779,192 792,305
Total capital expenditures 226,039 183,216 511,033 418,169
Operating Segments        
Segment Reporting [Line Items]        
Total segment cost of goods sold 81,231,995 77,803,194 239,152,757 229,293,817
Total segment operating income 1,238,086 1,058,331 3,564,149 3,199,903
Operating Segments | U.S. Healthcare Solutions        
Segment Reporting [Line Items]        
Total segment cost of goods sold 72,484,221 69,531,741 213,325,288 205,570,117
Total segment operating expenses 1,410,364 977,482 3,716,570 2,681,771
Total segment operating income 966,178 833,650 2,795,808 2,465,544
Total depreciation and amortization 111,563 74,322 277,809 207,383
Total capital expenditures 146,601 109,704 309,550 210,198
Operating Segments | International Healthcare Solutions        
Segment Reporting [Line Items]        
Total segment cost of goods sold 6,858,416 6,517,889 20,444,427 18,693,060
Total segment operating expenses 656,188 598,232 1,941,946 1,758,957
Total segment operating income 165,852 137,275 483,805 457,053
Total depreciation and amortization 36,433 35,354 109,177 99,813
Total capital expenditures 62,271 59,509 153,263 168,179
Other        
Segment Reporting [Line Items]        
Total segment cost of goods sold 1,924,740 1,792,348 5,473,147 5,115,156
Total segment operating expenses 219,854 228,012 672,915 673,886
Total segment operating income 108,736 87,104 291,786 277,284
Total depreciation and amortization 4,295 19,450 33,564 58,373
Total capital expenditures 17,167 14,003 48,220 39,792
Intersegment eliminations        
Segment Reporting [Line Items]        
Total segment cost of goods sold (35,382) (38,784) (90,105) (84,516)
Total segment operating expenses (1,650) (1,719) (5,568) (4,069)
Total segment operating income (2,680) 302 (7,250) 22
Acquisition-related intangibles amortization        
Segment Reporting [Line Items]        
Acquisition-related intangibles amortization $ 117,208 $ 124,869 $ 358,642 $ 426,736