CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Income Statement [Abstract]
Net sales	$ 4,742	$ 4,306
Cost of goods sold	2,846	2,596
Gross profit	1,896	1,710
Selling, general and administrative expenses	1,103	1,038
Operating earnings	793	672
Other expense (income):
Interest expense – net	21	21
Other – net	(3)	(6)
Total other expense – net	18	15
Earnings before income taxes	775	657
Income tax provision	194	157
Net earnings	581	500
Less net earnings attributable to noncontrolling interest	26	21
Net earnings attributable to W.W. Grainger, Inc.	$ 555	$ 479
Earnings per share:
Basic (in dollars per share)	$ 11.67	$ 9.88
Diluted (in dollars per share)	$ 11.65	$ 9.86
Weighted average number of shares outstanding:
Basic (in shares)	47.3	48.2
Diluted (in shares)	47.4	48.3

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(2)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(2)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479941/924-10-S99-1