XML 39 R55.htm IDEA: XBRL DOCUMENT v2.4.1.9
ACCOUNTING POLICIES (Details 3)
 12 Months Ended
Dec. 31, 2014
Goodwill and Other Intangible Assets  
Period of operation forecasts used in impairment test 5 years
Weighted average cost of capital (as a percent) 9.00%mas_WeightedAverageCostOfCapital
Minimum  
Goodwill and Other Intangible Assets  
Assumed annual growth rate of cash flows (as a percent) 1.00%mas_AssumedAnnualGrowthRateOfCashFlows
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Discount rate on estimated discounted cash flows (as a percent) 11.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum  
Goodwill and Other Intangible Assets  
Assumed annual growth rate of cash flows (as a percent) 3.00%mas_AssumedAnnualGrowthRateOfCashFlows
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Discount rate on estimated discounted cash flows (as a percent) 14.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember