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Business Segments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended				3 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended
	Apr. 01, 2014 Segment Business	Apr. 01, 2014 Business	Apr. 01, 2014 Rig Systems [Member] Business	Apr. 01, 2014 Rig Aftermarket [Member] Business	Sep. 30, 2013 Wellbore Technologies [Member]	Sep. 30, 2013 Wellbore Technologies [Member]	Apr. 01, 2014 Wellbore Technologies [Member] Business	Apr. 01, 2014 Completion & Production Solutions [Member] Business	Sep. 30, 2014 Revenue [Member]	Sep. 30, 2013 Revenue [Member]	Sep. 30, 2014 Revenue [Member]	Sep. 30, 2013 Revenue [Member]
Segment Reporting Information [Line Items]
Number of reportable segments	4
Number of business units		15	2	1			6	6
Net gains from legal settlement					$ 102	$ 102
Revenue from shipyard customer									8.00%	11.00%	8.00%	11.00%

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- Definition

Number Of Business Units

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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