Commitments and Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Expense for environmental remediation	$ 2.9us-gaap_EnvironmentalRemediationExpense	$ 2.1us-gaap_EnvironmentalRemediationExpense	$ 2.9us-gaap_EnvironmentalRemediationExpense
Reserves for environmental matters	8.8	10.8
Reserve for environmental matters, current	2.2	4.2
Total rental expense	32.5us-gaap_LeaseAndRentalExpense	35.3us-gaap_LeaseAndRentalExpense	35.5us-gaap_LeaseAndRentalExpense
Minimum lease payments, due in current year	22.8
Minimum lease payments, due in second year	10.4
Minimum lease payments, due in third year	5.9
Minimum lease payments, due in fourth year	3.1
Minimum lease payments, due in fifth year	1.4
Segment, Discontinued Operations [Member]
Reserves for environmental matters	$ 2.4	$ 2.9

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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