Pensions and Postretirement Benefits Other Than Pensions Pensions and Postretirement Benefits Other Than Pensions (Schedule ofMultiemployer Plans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Total contributions	$ 6.3	$ 5.4	$ 5.4