XML 48 R24.htm IDEA: XBRL DOCUMENT v2.4.0.6

Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2013

Payables And Accruals [Abstract]

Accrued Liabilities

Accrued liabilities consist of (in millions):

		March 31,				December 31,
		2013				2012
Customer prepayments and billings		$	687			$	699
Accrued vendor costs			493				444
Compensation			321				511
Warranty			188				194
Insurance			108				108
Taxes (non income)			105				150
Fair value of derivatives			47				18
Interest			35				14
Other			484				433
Total		$	2,468			$	2,571

Changes in Carrying Amount of Service and Product Warranties

The changes in the carrying amount of service and product warranties are as follows (in millions):

Balance at December 31, 2012		$	194
Net provisions for warranties issued during the year			18
Amounts incurred			(23	)
Currency translation adjustments and other			(1	)
Balance at March 31, 2013		$	188

X

- Definition

Schedule Of Product Warranty Table [Text Block]

+ References

No definition available.

+ Details

Name:	nov_ScheduleOfProductWarrantyTableTextBlock
Namespace Prefix:	nov_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

Tabular disclosure of the components of accrued liabilities.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration