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DEBT (Tables)
 3 Months Ended
Mar. 31, 2025
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt Instruments
Total debt, including long-term and current maturities, consisted of the following (in millions of dollars):
As of
March 31, 2025
December 31, 2024
Carrying ValueFair Value Carrying ValueFair Value
4.60% senior notes due 2045
$1,000 $893 $1,000 $894 
4.45% senior notes due 2034
500 480 500 477 
3.75% senior notes due 2046
400 332 400 332 
4.20% senior notes due 2047
400 316 400 312 
Debt issuance costs – net of amortization and other(22)(22)(21)(21)
Long-term debt2,278 1,999 2,279 1,994 
1.85% senior notes due 2025(1)
— — 500 498 
Other3 3 (1)(1)
Current maturities3 3 499 497 
Total debt$2,281 $2,002 $2,778 $2,491 
(1) On February 18, 2025, Grainger repaid in full the principal amount of $500 million for the 1.85% Senior Notes that matured in February 2025. The related interest rate swaps with a notional value of $450 million that hedged a portion of the interest rate risk related to this debt expired on February 15, 2025.