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SEGMENT INFORMATION | 9 Months Ended
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Sep. 30, 2018
Segment Reporting [Abstract] |
SEGMENT INFORMATION | SEGMENT INFORMATION Grainger's two reportable segments are the U.S. and Canada. These reportable segments reflect the results of the Company's businesses in those geographies, except for Zoro Tools, Inc. (Zoro), which is in the U.S. Other businesses include the Company's single channel businesses (Zoro and MonotaRO in Japan) and small operations in Europe, Asia and Latin America. These businesses individually do not meet the criteria of a reportable segment. Following is a summary of segment results (in thousands of dollars):
| Three Months Ended September 30, 2018
| U.S. |  | Canada |  | Other businesses |  | Total
Total net sales | $ | 2,188,324 |  |  | $ | 149,782 |  |  | $ | 609,317 |  |  | $ | 2,947,423 |
Intersegment net sales | (115,007 | ) |  | (22 | ) |  | (965 | ) |  | (115,994 | )
Net sales to external customers | $ | 2,073,317 |  |  | $ | 149,760 |  |  | $ | 608,352 |  |  | $ | 2,831,429 |
Segment operating earnings | $ | 326,273 |  |  | $ | (4,051 | ) |  | $ | (99,831 | ) |  | $ | 222,391 |
| Three Months Ended September 30, 2017
| U.S. |  | Canada |  | Other businesses |  | Total
Total net sales | $ | 2,015,968 |  |  | $ | 188,216 |  |  | $ | 536,927 |  |  | $ | 2,741,111 |
Intersegment net sales | (103,667 | ) |  | (13 | ) |  | (1,432 | ) |  | (105,112 | )
Net sales to external customers | $ | 1,912,301 |  |  | $ | 188,203 |  |  | $ | 535,495 |  |  | $ | 2,635,999 |
Segment operating earnings | $ | 294,603 |  |  | $ | (14,972 | ) |  | $ | 26,892 |  |  | $ | 306,523 |
| Nine Months Ended September 30, 2018
| U.S. |  | Canada |  | Other businesses |  | Total
Total net sales | $ | 6,471,116 |  |  | $ | 508,414 |  |  | $ | 1,819,562 |  |  | $ | 8,799,092 |
Intersegment net sales | (337,912 | ) |  | (55 | ) |  | (3,083 | ) |  | (341,050 | )
Net sales to external customers | $ | 6,133,204 |  |  | $ | 508,359 |  |  | $ | 1,816,479 |  |  | $ | 8,458,042 |
Segment operating earnings | $ | 1,032,491 |  |  | $ | (37,875 | ) |  | $ | (22,509 | ) |  | $ | 972,107 |
| Nine Months Ended September 30, 2017
| U.S. |  | Canada |  | Other businesses |  | Total
Total net sales | $ | 5,968,565 |  |  | $ | 563,470 |  |  | $ | 1,560,894 |  |  | $ | 8,092,929 |
Intersegment net sales | (297,247 | ) |  | (15 | ) |  | (3,270 | ) |  | (300,532 | )
Net sales to external customers | $ | 5,671,318 |  |  | $ | 563,455 |  |  | $ | 1,557,624 |  |  | $ | 7,792,397 |
Segment operating earnings | $ | 913,705 |  |  | $ | (59,428 | ) |  | $ | 44,177 |  |  | $ | 898,454 |
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Operating earnings: |  |  |
Segment operating earnings | $ | 222,391 |  |  | $ | 306,523 |  |  | $ | 972,107 |  |  | $ | 898,454 |
Unallocated expenses and eliminations | (33,269 | ) |  | (28,785 | ) |  | (104,169 | ) |  | (99,135 | )
Total consolidated operating earnings | $ | 189,122 |  |  | $ | 277,738 |  |  | $ | 867,938 |  |  | $ | 799,319 |
Segment and total consolidated operating earnings for the three and nine months ended September 30, 2017 were restated for the implementation of ASU 2017-07. See Note 2 to the Financial Statements. Unallocated expenses and eliminations primarily relate to the Company's headquarters support services and intercompany eliminations, which are not part of any reportable segment. Unallocated expenses are primarily comprised of employee compensation costs, depreciation and other administrative costs. The Company is a broad-line distributor of MRO supplies, and other related products. Products are regularly added and deleted from the Company's inventory. Accordingly, it would be impractical to provide sales information by product category due to the way the business is managed. Following are reconciliations of segment assets with the total consolidated assets per the financial statements (in thousands of dollars):
| U.S. |  | Canada |  | Other businesses |  | Total
Segment assets: |  |  |  |  |  |  |
September 30, 2018 | $ | 2,515,137 |  |  | $ | 213,525 |  |  | $ | 672,854 |  |  | $ | 3,401,516 |
December 31, 2017 | $ | 2,309,734 |  |  | $ | 278,633 |  |  | $ | 605,452 |  |  | $ | 3,193,819 |
| As of
Total assets: | September 30, 2018 |  | December 31, 2017
Assets for reportable segments | 3,401,516 |  |  | 3,193,819 |
Other current and non-current assets | 2,251,555 |  |  | 2,428,074 |
Unallocated assets | 279,112 |  |  | 182,361 |
Total consolidated assets | $ | 5,932,183 |  |  | $ | 5,804,254 |
Assets for reportable segments include net accounts receivable and first-in, first-out inventory which are reported to the Company's Chief Operating Decision Maker. Other current and non-current assets include all other assets of the reportable segments. Unallocated assets are primarily comprised of non-operating cash and cash equivalents, property, buildings and equipment, net, and certain prepaid expenses related to the Company's headquarters support services.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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