CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings	$ 490	$ 490	$ 987	$ 998
Other comprehensive earnings (losses):
Foreign currency translation adjustments – net of reclassification to earnings	(57)	(32)	(111)	(30)
Postretirement benefit plan losses and other – net of tax benefits of $1, $1, $2, and $2, respectively	(4)	(3)	(7)	(6)
Total other comprehensive earnings (losses)	(61)	(35)	(118)	(36)
Comprehensive earnings – net of tax	429	455	869	962
Less comprehensive earnings (losses) attributable to noncontrolling interest
Net earnings	20	20	39	40
Foreign currency translation adjustments	(20)	(27)	(42)	(32)
Total comprehensive earnings (losses) attributable to noncontrolling interest	0	(7)	(3)	8
Comprehensive earnings attributable to W.W. Grainger, Inc.	$ 429	$ 462	$ 872	$ 954