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Accrued Liabilities - Accrued Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Payables and Accruals [Abstract]
Accrued vendor costs	$ 815nov_AccruedPurchaseOrders	$ 531nov_AccruedPurchaseOrders
Customer prepayments and billings	703us-gaap_CustomerAdvancesCurrent	673us-gaap_CustomerAdvancesCurrent
Compensation	662us-gaap_EmployeeRelatedLiabilitiesCurrent	516us-gaap_EmployeeRelatedLiabilitiesCurrent
Fair value of derivatives	297us-gaap_DerivativeInstrumentsAndHedgesLiabilities	31us-gaap_DerivativeInstrumentsAndHedgesLiabilities
Warranty	272us-gaap_StandardProductWarrantyAccrualCurrent	228us-gaap_StandardProductWarrantyAccrualCurrent	194us-gaap_StandardProductWarrantyAccrualCurrent
Taxes (non income)	211us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent	188us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent
Insurance	126us-gaap_AccruedInsuranceCurrent	131us-gaap_AccruedInsuranceCurrent
Accrued commissions	97nov_AccruedCommissionsExpense	97nov_AccruedCommissionsExpense
Interest	11us-gaap_InterestPayableCurrent	11us-gaap_InterestPayableCurrent
Other	324us-gaap_OtherAccruedLiabilitiesCurrent	357us-gaap_OtherAccruedLiabilitiesCurrent
Total	$ 3,518us-gaap_AccruedLiabilitiesCurrent	$ 2,763us-gaap_AccruedLiabilitiesCurrent

X

- Definition

Accrued Commissions Expense

+ References

No definition available.

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- Definition

Accrued purchase orders.

+ References

No definition available.

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X

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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-Publisher SEC

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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

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-Publisher FASB

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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- Definition

The current portion of prepayments received from customers for goods or services to be provided in the future.

+ References

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- Definition

Sum as of the balance sheet date of the (a) fair values of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and (b) the carrying amounts of the liabilities arising from financial instruments or contracts used to mitigate a specified risk (hedge), and which are expected to be extinguished or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements.

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- Definition

Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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- Definition

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid within one year or the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability.

+ References

No definition available.

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