Fair value of instruments in a net liability position and with a credit contingent feature.

No definition available.

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Balance Type:	credit
Period Type:	instant

- Definition

Term of Credit Risk Derivatives.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Description of the credit rating indicative of likelihood of repayment of the debt instrument given by a credit rating agency (for example, Standard and Poor's, Moody's, Fitch).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

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Balance Type:
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- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
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- Details

Name:	us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsBBBMinusRatingMember
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- Details

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- Details

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- Details

Name:	us-gaap_CreditRatingMoodysAxis=us-gaap_MoodysBaa3RatingMember
Namespace Prefix:
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Fair Value Measurements and Derivative Instruments (Credit Features) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) derivative	Dec. 31, 2014 USD ($)
Maturity of at least five years \| Lower Limit
Derivative instruments disclosure
Interest rate instrument term	5 years
Interest rate contracts
Derivative instruments disclosure
Number of derivative instruments \| derivative	7
Aggregate fair value of all derivative instruments with credit-related contingent features in net liability positions \| $	$ 67.4	$ 65.8
Standard & Poor's, BBB- Rating \| Lower Limit
Derivative instruments disclosure
Credit ratings for senior debt	BBB-
Standard & Poor's, BB Rating
Derivative instruments disclosure
Credit ratings for senior debt	BB+
Moody's, Ba1 Rating
Derivative instruments disclosure
Credit ratings for senior debt	Ba1
Moody's, Baa3 Rating
Derivative instruments disclosure
Credit ratings for senior debt	Baa3