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SHAREHOLDERS' EQUITY (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Schedule of components of accumulated other comprehensive loss The components of accumulated other comprehensive loss attributable to Masco Corporation were as follows, in millions:
 At December 31
 20202019
Cumulative translation adjustments, net$325 $273 
Unrealized loss on interest rate swaps, net(7)(8)
Unrecognized net loss and prior service cost, net(460)(444)
Accumulated other comprehensive loss$(142)$(179)