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REVENUE
 12 Months Ended
Dec. 31, 2023
REVENUE [Abstract]  
REVENUE REVENUE
The Company's revenue is primarily comprised of MRO product sales and related activities, such as freight and services.

Grainger serves a large number of customers in diverse industries, which are subject to different economic and market-specific factors. The Company's presentation of revenue by segment and industry most reasonably depicts how the nature, amount, timing and uncertainty of the Company's revenue and cash flows are affected by economic and market-specific factors. In addition, the segments have unique underlying risks associated with customer purchasing behaviors. In the High-Touch Solutions N.A. segment, more than two-thirds of revenue is derived from customer contracts whereas in the Endless Assortment segment, a majority of revenue is derived from non-contractual purchases.

The following table presents the Company's percentage of revenue by reportable segment and by major customer industry:
 Twelve Months Ended December 31,
2023
2022(1)
2021(1)
 High-Touch Solutions N.A. Endless Assortment 
Total Company (2)
High-Touch Solutions N.A.Endless Assortment
Total Company (2)
High-Touch Solutions N.A.Endless Assortment
Total Company (2)
Manufacturing30 %30 %30 %31 %30 %30 %29 %30 %30 %
Government19 %3 %16 %18 %3 %15 %19 %3 %15 %
Wholesale7 %16 %9 %7 %16 %9 %7 %14 %8 %
Commercial Services7 %12 %8 %7 %13 %8 %7 %13 %8 %
Contractors5 %12 %6 %5 %12 %6 %5 %13 %6 %
Healthcare7 %2 %6 %7 %2 %6 %8 %2 %7 %
Retail4 %4 %4 %4 %4 %4 %4 %5 %4 %
Transportation4 %2 %4 %4 %2 %4 %4 %2 %4 %
Utilities3 %2 %3 %3 %2 %3 %3 %2 %3 %
Warehousing4 %— %3 %5 %— %4 %5 %— %4 %
Other(3)
10 %17 %11 %9 %16 %11 %9 %16 %11 %
Total net sales100 % 100 % 100 %100 %100 %100 %100 %100 %100 %
Percent of total company revenue81 %18 %100 %80 %18 %100 %78 %20 %100 %
(1) Customer industry results for the twelve months ended December 31, 2022, and 2021 were reclassified to reflect the Company's current year classifications, which primarily uses the North American Industry Classification System (NAICS) beginning January 1, 2023.
(2) Total Company includes Other, which includes the Cromwell business. Other accounts for approximately 1%, 2% and 2% of revenue for the twelve months ended December 31, 2023, 2022 and 2021, respectively.
(3) Other primarily includes revenue from industries and customers that are not material individually, including hospitality, restaurants, property management and natural resources.