XML 76 R45.htm IDEA: XBRL DOCUMENT v3.5.0.2
Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Sep. 30, 2015
Jun. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Income Tax Disclosure [Abstract]                
Provision for income taxes $ 9.6 $ (12.6) $ (7.6) $ 16.8 $ (20.2) $ 29.8 $ 58.2  
Effective tax rate (30.90%)     (933.30%)   (29.80%) (63.80%)  
Reduction in effective tax rate (percent) 2.90%         1.90%    
Excess tax benefit $ 0.9 $ 0.2 0.8   $ 1.0 $ 1.9    
Increase in deferred tax assets in the US in conjunction with the Separation     $ 77.0          
Repatriated foreign earnings from foreign subsidiaries transferred to GCP pursuant to the Separation               $ 173.1
Repatriation of foreign earnings, tax expense               $ 19.9
Repatriation of foreign earnings, effective tax rate               15.90%