Summary of Significant Accounting Policies, Part 3 (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2019
Environmental Costs [Abstract]
Environmental reserves - current portion	$ 3.2	$ 5.6
Forecast [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset				$ 250.0
Operating Lease, Liability				$ 250.0
Environmental Reserves [Member]
Movement in valuation allowances and reserves [Roll Forward]
Balance at beginning of period	11.6	11.9	$ 13.0
Charged to costs and expenses	8.2	12.1	7.0
Acquisition-related additions and other	1.7	1.7	0.5
Deductions	(14.6)	(14.1)	(8.6)
Balance at end of period	$ 6.9	$ 11.6	$ 11.9
Minimum [Member]
Impairment Testing for Goodwill [Abstract]
Reporting unit, percentage of fair value in excess of carrying amount	10.00%
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New accounting pronouncement or change in accounting principle, description of financial statement line items	less than 1% of our total consolidated assets and liabilities