v3.26.3
NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES (Details)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
May 28, 2026
USD ($)
$ / shares
shares
Mar. 10, 2026
USD ($)
$ / shares
shares
Dec. 18, 2025
USD ($)
$ / shares
shares
Sep. 26, 2026
USD ($)
center
Sep. 26, 2026
USD ($)
center
shares
Sep. 27, 2025
USD ($)
Dec. 31, 2025
shares
Dec. 16, 2025
Product Information [Line Items]                
Loss contingency accrual, loss in period, other expenses       $ 71 $ 87      
Proceeds from insurance recoveries       $ 100 $ 100 $ 0    
Number of distribution centers | center       2 2      
Sale of stock, number of shares issued in transaction (in shares) | shares 72,554,594 86,250,000            
Sale of stock, price (in dollars per share) | $ / shares $ 37.00 $ 41.00            
Sale of stock, consideration received on transaction $ 2,700 $ 3,500            
Damage from fire                
Product Information [Line Items]                
Loss contingency accrual, loss in period       $ 80 $ 416      
Loss contingency accrual, loss in period, inventory       1 205      
Loss contingency accrual, loss in period, fixed assets       $ 8 $ 124      
Medline Holdings                
Product Information [Line Items]                
Noncontrolling ownership percent, decrease 2.00% 3.00%            
Ownership percentage               100.00%
Euro Term Loans | Secured debt                
Product Information [Line Items]                
Repayments of secured debt     $ 731          
Dollar Term Loans | Secured debt                
Product Information [Line Items]                
Repayments of secured debt     $ 3,292          
Class A common stock                
Product Information [Line Items]                
Exchange of common units for Class A common stock (in shares) | shares 29,505,565 33,963,901            
Class B common stock                
Product Information [Line Items]                
Common stock, conversion ratio (in shares) | shares         1   1  
Over-Allotment Option                
Product Information [Line Items]                
Sale of stock, number of shares issued in transaction (in shares) | shares   11,250,000            
IPO                
Product Information [Line Items]                
Sale of stock, number of shares issued in transaction (in shares) | shares     248,439,654          
Sale of stock, price (in dollars per share) | $ / shares     $ 29.00          
Sale of stock, consideration received on transaction     $ 7,048          
Underwriting discount and commission expense     157          
Offering expense     $ 40          
IPO, Secured Debt Repayment                
Product Information [Line Items]                
Sale of stock, number of shares issued in transaction (in shares) | shares     179,000,000          
Sale of stock, consideration received on transaction     $ 5,078          
IPO, Purchase or Redemption of Class A Holders                
Product Information [Line Items]                
Sale of stock, number of shares issued in transaction (in shares) | shares     37,034,482          
Sale of stock, consideration received on transaction     $ 1,051          
IPO, Purchase or Redemption of Common Units                
Product Information [Line Items]                
Sale of stock, number of shares issued in transaction (in shares) | shares     32,405,172          
Sale of stock, consideration received on transaction     $ 919