XML 54 R44.htm IDEA: XBRL DOCUMENT v2.4.0.8

Investments in Non-Consolidated Affiliates (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Investments in Non-Consolidated Affiliates
Initial payment received from the sale of the joint venture	$ 37.6
Installment payments received from the sale of the joint venture		4.8	14.2	14.1
Remaining principal amount due from sale of joint venture		$ 44	$ 44
PIGAP II
Ownership interest of each equity method investee
Ownership Interest (as a percent)		30.00%	30.00%
El Furrial
Ownership interest of each equity method investee
Ownership Interest (as a percent)		33.30%	33.30%

X

- Definition

The additional cash inflows expected to be received on disposal of an equity method investment.

+ References

No definition available.

+ Details

Name:	exh_EquityMethodInvestmentExpectedNetSalesProceeds
Namespace Prefix:	exh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The cash inflows from initial proceeds received on disposal of an equity method investment.

+ References

No definition available.

+ Details

Name:	exh_EquityMethodInvestmentSalesProceedsInitialPayment
Namespace Prefix:	exh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The cash inflows from installment payments received during the period on disposal of an equity method investment.

+ References

No definition available.

+ Details

Name:	exh_EquityMethodInvestmentSalesProceedsInstallmentPayment
Namespace Prefix:	exh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

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

X

- Details

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