Employee Retirement Plans (Multiemployer Pension Plans) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014 plan	Jun. 30, 2013	Jul. 02, 2010
Multiemployer Plans [Line Items]
Number of underfunded plans	2
Withdrawal obligation	$ 65.8		$ 98.6
Multiemployer plan contributions	7.2	7.2
Other Liabilities, Noncurrent [Member]
Multiemployer Plans [Line Items]
Withdrawal obligation	45.8
Accrued Liabilities [Member]
Multiemployer Plans [Line Items]
Withdrawal obligation	14.5
Unsecured Notes [Member]
Multiemployer Plans [Line Items]
Withdrawal obligation	$ 5.5