XML 168 R130.htm IDEA: XBRL DOCUMENT v2.4.0.8

Commitments and Contingencies (Venezuelan Operations) - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	1 Months Ended
	Jun. 30, 2009	May 31, 2009 Venezuelan National Oil Company Vessel	Jul. 31, 2009 Petrosucre S Vessel
Commitments and Contingencies Disclosure [Line Items]
Number of vessels seized		11	4
Provision for uncollectible accounts	$ 44.8

X

- Details

Name:	tdw_CommitmentsAndContingenciesDisclosureLineItems
Namespace Prefix:	tdw_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of vessels seized.

+ References

No definition available.

+ Details

Name:	tdw_NumberOfVesselSeized
Namespace Prefix:	tdw_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.5)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 5

-Article 5

+ Details

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