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ACCUMULATED OTHER COMPREHENSIVE EARNINGS (LOSSES) (AOCE) (Tables) | 12 Months Ended
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Dec. 31, 2018
Stockholders' Equity Note [Abstract] |
Schedule of AOCE | The components of AOCE consisted of the following (in millions of dollars):
| Foreign Currency Translation and Other | Defined Postretirement Benefit Plan | Other Employment-related Benefit Plans | Total | Foreign Currency Translation Attributable to Noncontrolling Interests | AOCE Attributable to W.W. Grainger, Inc.
Balance at January 1, 2016, net of tax | $ | (277 | ) | $ | 35 |  | $ | (3 | ) | $ | (245 | ) | $ | (24 | ) | $ | (221 | )
Other comprehensive earnings (loss) before reclassifications, net of tax | (39 | ) | (6 | ) | (2 | ) | (47 | ) | 1 |  | (48 | )
Amounts reclassified to Net earnings | — |  | (4 | ) | — |  | (4 | ) | — |  | (4 | )
Net current period activity | $ | (39 | ) | $ | (10 | ) | $ | (2 | ) | $ | (51 | ) | $ | 1 |  | $ | (52 | )
Balance at December 31, 2016, net of tax | $ | (316 | ) | $ | 25 |  | $ | (5 | ) | $ | (296 | ) | $ | (23 | ) | $ | (273 | )
Other comprehensive earnings (loss) before reclassifications, net of tax | 75 |  | 86 |  | 1 |  | 162 |  | 4 |  | 158 |
Amounts reclassified to Net earnings | 18 |  | (38 | ) | — |  | (20 | ) | — |  | (20 | )
Net current period activity | $ | 93 |  | $ | 48 |  | $ | 1 |  | $ | 142 |  | $ | 4 |  | $ | 138 |
Balance at December 31, 2017, net of tax | $ | (223 | ) | $ | 73 |  | $ | (4 | ) | $ | (154 | ) | $ | (19 | ) | $ | (135 | )
Other comprehensive earnings (loss) before reclassifications, net of tax | (43 | ) | 4 |  | (1 | ) | (40 | ) | 3 |  | (43 | )
Amounts reclassified to Net earnings | 2 |  | (10 | ) | — |  | (8 | ) | — |  | (8 | )
Amounts reclassified to Retained earnings | — |  | 15 |  | — |  | 15 |  | — |  | 15 |
Net current period activity | (41 | ) | 9 |  | (1 | ) | (33 | ) | 3 |  | (36 | )
Balance at December 31, 2018, net of tax | $ | (264 | ) | $ | 82 |  | $ | (5 | ) | $ | (187 | ) | $ | (16 | ) | $ | (171 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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