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Equity Method Investments (Details) - USD ($)
$ in Millions
Jun. 30, 2016
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]    
Equity method investments $ 648 $ 682
USG Boral Building Products    
Schedule of Equity Method Investments [Line Items]    
Equity method investments $ 641 $ 675
Ownership percentage 50.00% 50.00%
Other equity method investments    
Schedule of Equity Method Investments [Line Items]    
Equity method investments $ 7 $ 7
Other equity method investments | Minimum    
Schedule of Equity Method Investments [Line Items]    
Ownership percentage 33.00% 33.00%
Other equity method investments | Maximum    
Schedule of Equity Method Investments [Line Items]    
Ownership percentage 50.00% 50.00%