Related Party Transactions (Investments) (Narrative) (Details) (Cross Country Pipeline [Member], Management [Member], USD $) In Millions, unless otherwise specified		3 Months Ended	9 Months Ended
Dec. 31, 2013 Cost Method Investment [Member]	Sep. 30, 2014 Lease And Rental Agreements [Member] Equipment [Member]	Sep. 30, 2014 Lease And Rental Agreements [Member] Equipment [Member]
Related Party Transaction [Line Items]
Cost method investment, original cost	$ 15
Expenses from transactions with related party		$ 1.9	$ 4.6

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration