v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investment valuation, Short sales (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Abbott Laboratories Stock Retirement Plan    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value $ 17,659,748 $ 15,576,603
Investments sold short, at fair value 327,342 19,750
Abbott Laboratories Stock Retirement Plan | Quoted Prices in Active Markets    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 5,729,061 5,200,474
Abbott Laboratories Stock Retirement Plan | Significant Other Observable Inputs    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 411,801 390,204
Investments sold short, at fair value 327,342 19,750
Abbott Laboratories Stock Retirement Plan | Measured at NAV    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 11,518,886 9,985,925
Abbott Laboratories Stock Retirement Plan | Common stock    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 5,585,157 5,066,260
Abbott Laboratories Stock Retirement Plan | Common stock | Quoted Prices in Active Markets    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 5,585,157 5,066,260
Abbott Laboratories Stock Retirement Plan | Mutual funds    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 120,058 108,326
Abbott Laboratories Stock Retirement Plan | Mutual funds | Quoted Prices in Active Markets    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 120,058 108,326
Abbott Laboratories Stock Retirement Plan | REITs    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 23,846 25,888
Abbott Laboratories Stock Retirement Plan | REITs | Quoted Prices in Active Markets    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 23,846 25,888
Abbott Laboratories Stock Retirement Plan | Collective trust funds    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 11,120,673 9,592,890
Abbott Laboratories Stock Retirement Plan | Collective trust funds | Measured at NAV    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 11,120,673 9,592,890
Abbott Laboratories Stock Retirement Plan | Corporate debt    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 227,462 235,392
Abbott Laboratories Stock Retirement Plan | Corporate debt | Significant Other Observable Inputs    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 227,462 235,392
Abbott Laboratories Stock Retirement Plan | Government debt    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 184,339 154,812
Investments sold short, at fair value 327,342 19,750
Abbott Laboratories Stock Retirement Plan | Government debt | Significant Other Observable Inputs    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 184,339 154,812
Investments sold short, at fair value 327,342 19,750
Abbott Laboratories Stock Retirement Plan | Private 40-Act mutual funds    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 398,213 393,035
Abbott Laboratories Stock Retirement Plan | Private 40-Act mutual funds | Measured at NAV    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 398,213 393,035
Abbott Laboratories Stock Retirement Plan | Funds filing as direct filing entity | Collective trust funds | Measured at NAV    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 11,120,673 9,592,890
Abbott Laboratories Stock Retirement Plan (Puerto Rico)    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 264,892 237,222
Abbott Laboratories Stock Retirement Plan (Puerto Rico) | Quoted Prices in Active Markets    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 159,403 145,193
Abbott Laboratories Stock Retirement Plan (Puerto Rico) | Measured at NAV    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 105,489 92,029
Abbott Laboratories Stock Retirement Plan (Puerto Rico) | Common stock    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 106,951 96,512
Abbott Laboratories Stock Retirement Plan (Puerto Rico) | Common stock | Quoted Prices in Active Markets    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 106,951 96,512
Abbott Laboratories Stock Retirement Plan (Puerto Rico) | Mutual funds    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 52,452 48,681
Abbott Laboratories Stock Retirement Plan (Puerto Rico) | Mutual funds | Quoted Prices in Active Markets    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 52,452 48,681
Abbott Laboratories Stock Retirement Plan (Puerto Rico) | Collective trust funds    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 105,489 92,029
Abbott Laboratories Stock Retirement Plan (Puerto Rico) | Collective trust funds | Measured at NAV    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value 105,489 92,029
Abbott Laboratories Stock Retirement Plan (Puerto Rico) | Funds filing as direct filing entity | Collective trust funds | Measured at NAV    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Investments, at fair value $ 105,489 $ 92,029