Noncontrolling Interests (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Noncontrolling interest
Balance at the beginning of the period	$ 362.8us-gaap_MinorityInterest
Earnings attributable to noncontrolling interest	5.3	11.9
Declaration of distribution payable	(11.5)	(9.6)
Balance at the end of the period	356.6us-gaap_MinorityInterest
TNCLP
Noncontrolling interest
Balance at the beginning of the period	362.8	362.3
Earnings attributable to noncontrolling interest	5.3	11.9
Declaration of distribution payable	(11.5)	(9.6)
Balance at the end of the period	356.6	364.6
Distributions payable to noncontrolling interest:
Distribution payable to noncontrolling interest, balance at the beginning of the period	0	0
Declaration of distributions payable	11.5	9.6
Distributions to noncontrolling interest	(11.5)	(9.6)
Distribution payable to noncontrolling interest, balance at the end of the period	$ 0	$ 0

Declared but unpaid dividends or other distributions to noncontrolling interest holders.

No definition available.

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- Definition

Represents the increase in distributions amount payable to the noncontrolling interest holders from distributions declared.

+ References

No definition available.

+ Details

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- Definition

Represents the distributions amount payable by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

+ References

No definition available.

+ Details

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.31)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 27

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 20

-Article 7

+ Details

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- Definition

Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

Amount of Net Income (Loss) attributable to noncontrolling interest.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4J

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686

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