Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Loss Contingencies [Line Items]
Liabilities recognized for estimated environmental costs	$ 37.1		$ 38.5
Estimated environmental liabilities, years	10 years
Environmental expenses	0.3	0.7
Receivables from insurance carriers related to environmental matters	4.7		4.8
Accounts Receivable [Member]
Loss Contingencies [Line Items]
Receivables from insurance carriers related to environmental matters	2.1		2.1
Other Noncurrent Assets [Member]
Loss Contingencies [Line Items]
Receivables from insurance carriers related to environmental matters	2.6		2.7
Direct Financing Lease [Member]
Loss Contingencies [Line Items]
Pipeline Length	36
Net Investment in Direct Financing and Sales Type Leases	35.0
Capital Recovery Payments Receivable	$ 19.3
Capital Recovery Payments Period	41 months