Income Taxes (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Feb. 03, 2016	Jan. 01, 2016
Tax Credit Carryforward [Line Items]
Effective tax rate (percent)	38.00%	36.00%
Change in deferred tax assets valuation allowance	$ 12.8
Separation-related charges	8.8
Tax charges related to tax law change	4.0
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	6.3
Deductions Generated at Emergence	$ 1,800.0
Period allowed for carryforward of operation loss	20 years
Expected income tax deductions generated from deferred payment obligation	$ 30.0
Deferred Tax Assets, Net [Abstract]
Deferred Tax Asset (Net of Liabilities)	756.1
Valuation Allowance	(41.5)
Net Deferred Tax Asset	714.6
Taxable income required to realized DTA total amount	1,800.0
Taxable income required to realize DTA per year	95.0
Foreign earnings repatriated		$ 173.1
Tax expense for repatriation	1.7	19.0
Deferred income taxes	717.0	714.3
United States - Federal
Deferred Tax Assets, Net [Abstract]
Deferred Tax Asset (Net of Liabilities)	660.7
Valuation Allowance	(20.8)
Net Deferred Tax Asset	639.9
United States - States
Deferred Tax Assets, Net [Abstract]
Deferred Tax Asset (Net of Liabilities)	55.2
Valuation Allowance	(18.1)
Net Deferred Tax Asset	37.1
Germany
Deferred Tax Assets, Net [Abstract]
Deferred Tax Asset (Net of Liabilities)	30.9
Valuation Allowance	0.0
Net Deferred Tax Asset	30.9
Other foreign
Deferred Tax Assets, Net [Abstract]
Deferred Tax Asset (Net of Liabilities)	9.3
Valuation Allowance	(2.6)
Net Deferred Tax Asset	$ 6.7
Grace Construction Products | Discontinued Operations, Disposed of by Sale
Deferred Tax Assets, Net [Abstract]
Deferred tax assets transferred		$ 32.0	$ 85.0
New Accounting Pronouncement, Early Adoption, Effect [Member]
Deferred Tax Assets, Net [Abstract]
Deferred income taxes				$ 70.4
Deferred Tax Assets, Valuation Allowance, Noncurrent				$ 20.5