XML 60 R39.htm IDEA: XBRL DOCUMENT v2.4.1.9

Equity Investments (Details) (USD $)	3 Months Ended
	Mar. 31, 2015 equity_investment	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Number of equity investments	2hlx_NumberOfEquityInvestments
Equity investments in unconsolidated affiliates	$ 148,147,000us-gaap_EquityMethodInvestments	$ 149,623,000us-gaap_EquityMethodInvestments
Deepwater Gateway, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_DeepwaterGatewayLLCMember
Equity investments in unconsolidated affiliates	80,100,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_DeepwaterGatewayLLCMember	80,900,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_DeepwaterGatewayLLCMember
Capitalized interest	1,200,000hlx_CapitalizedInterest / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_DeepwaterGatewayLLCMember	1,200,000hlx_CapitalizedInterest / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_DeepwaterGatewayLLCMember
Independence Hub, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_IndependenceHubLlcMember
Equity investments in unconsolidated affiliates	68,000,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_IndependenceHubLlcMember	68,800,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_IndependenceHubLlcMember
Capitalized interest	$ 3,900,000hlx_CapitalizedInterest / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_IndependenceHubLlcMember	$ 3,900,000hlx_CapitalizedInterest / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_IndependenceHubLlcMember
Water depth	8,000hlx_WaterDepth / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = hlx_IndependenceHubLlcMember

X

- Definition

The balance of interest capitalized, net, related to the Company's equity method investments or property, plant and equipment.

+ References

No definition available.

+ Details

Name:	hlx_CapitalizedInterest
Namespace Prefix:	hlx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The number of equity investments.

+ References

No definition available.

+ Details

Name:	hlx_NumberOfEquityInvestments
Namespace Prefix:	hlx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Depth of the water.

+ References

No definition available.

+ Details

Name:	hlx_WaterDepth
Namespace Prefix:	hlx_
Data Type:	num:lengthItemType
Balance Type:	na
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

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ 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 210.5-02.12)

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



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570

+ Details

Name:	us-gaap_EquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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

X

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=hlx_DeepwaterGatewayLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=hlx_IndependenceHubLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: