{"cik":916076,"taxonomy":"us-gaap","tag":"NetCashProvidedByUsedInOperatingActivitiesContinuingOperations","label":"Net Cash Provided by (Used in) Operating Activities, Continuing Operations","description":"Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.","entityName":"MARTIN MARIETTA MATERIALS INC","units":{"USD":[{"start":"2014-01-01","end":"2014-06-30","val":70363000,"accn":"0001564590-15-006695","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-07"},{"start":"2014-01-01","end":"2014-09-30","val":201628000,"accn":"0001564590-15-009552","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"},{"start":"2015-01-01","end":"2015-06-30","val":127069000,"accn":"0001564590-15-006695","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-07"},{"start":"2015-01-01","end":"2015-09-30","val":319579000,"accn":"0001564590-15-009552","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-05"}]}}