Summary of Significant Accounting Policies, Textuals (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014 Fabricated Products	Dec. 31, 2013 Fabricated Products
Significant accounting policies
Charge decrementing prior year LIFO	$ 0.6	$ 2.4
Excess of current cost over the stated LIFO value of inventory			$ 17.4	$ 0.4