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Subsequent Events (Details) (Subsequent event, USD $)	0 Months Ended
	Jul. 11, 2014	Jul. 11, 2015	Apr. 11, 2015
Maximum
Subsequent event
Out-of-pocket fees and expense to be reimburse by non-terminating party			$ 40,000,000
URS Corporation
Subsequent event
Proposed stock issuance for acquisition	4,000,000,000
Agreement termination fee		$ 240,000,000	$ 140,000,000

X

- Definition

Represents the amount related to the termination of agreement between the parties.

+ References

No definition available.

+ Details

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X

- Definition

Represents the amount of out-of-pocket fees and expense to be reimburse by non-terminating party.

+ References

No definition available.

+ Details

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X

- Definition

Value of stock issued pursuant to acquisitions during the period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



Reference 3: 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



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29-31)

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



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5

+ Details

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Period Type:	duration

X

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