{"cik":277135,"taxonomy":"us-gaap","tag":"CommonStockDividendsPerShareDeclared","label":"Common Stock, Dividends, Per Share, Declared","description":"Aggregate dividends declared during the period for each share of common stock outstanding.","entityName":"W.W. GRAINGER, INC.","units":{"USD/shares":[{"start":"2007-01-01","end":"2007-12-31","val":1.34,"accn":"0000277135-10-000011","fy":2009,"fp":"FY","form":"10-K","filed":"2010-02-25","frame":"CY2007"},{"start":"2008-01-01","end":"2008-12-31","val":1.55,"accn":"0000277135-10-000011","fy":2009,"fp":"FY","form":"10-K","filed":"2010-02-25"},{"start":"2008-01-01","end":"2008-12-31","val":1.55,"accn":"0000277135-11-000011","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-28","frame":"CY2008"},{"start":"2009-01-01","end":"2009-12-31","val":1.78,"accn":"0000277135-10-000011","fy":2009,"fp":"FY","form":"10-K","filed":"2010-02-25"},{"start":"2009-01-01","end":"2009-12-31","val":1.78,"accn":"0000277135-11-000011","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-28","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":2.08,"accn":"0000277135-11-000011","fy":2010,"fp":"FY","form":"10-K","filed":"2011-02-28","frame":"CY2010"},{"start":"2014-04-01","end":"2014-04-30","val":1.08,"accn":"0000277135-15-000013","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-04-30","frame":"CY2014Q1I"},{"end":"2016-01-27","val":1.22,"accn":"0000277135-16-000046","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-04-28","frame":"CY2015Q4I"}]}}