XML 115 R29.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Derivative Financial Instruments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract] |
Outstanding Foreign Currency Forward Contracts | Forward currency contracts consist of (in millions):
|  | Currency Denomination |
Currency |  | December 31, 2019 |  |  | December 31, 2018 |
South Korean Won |  | KRW |  |  | 17,600 |  |  | KRW |  |  | — |
Norwegian Krone |  | NOK |  |  | 5,377 |  |  | NOK |  |  | 5,229 |
Russian Ruble |  | RUB |  |  | 1,012 |  |  | RUB |  |  | — |
U.S. Dollar |  | USD |  |  | 686 |  |  | USD |  |  | 631 |
Euro |  | EUR |  |  | 188 |  |  | EUR |  |  | 172 |
South African Rand |  | ZAR |  |  | 124 |  |  | ZAR |  |  | 124 |
Mexican Peso |  | MXN |  |  | 115 |  |  | MXN |  |  | 204 |
Singapore Dollar |  | SGD |  |  | 42 |  |  | SGD |  |  | — |
Japanese Yen |  | JPY |  |  | 36 |  |  | JPY |  |  | 121 |
Danish Krone |  | DKK |  |  | 21 |  |  | DKK |  |  | 35 |
British Pound Sterling |  | GBP |  |  | 20 |  |  | GBP |  |  | 12 |
Canadian Dollar |  | CAD |  |  | 3 |  |  | CAD |  |  | — |
Derivative Instruments and their Balance Sheet Classifications | The Company has the following fair values of its derivative instruments and their balance sheet classifications (in millions):
|  | Fair Values of Derivative Instruments (In millions) |
|  | Asset Derivatives |  |  | Liability Derivatives |
|  |  |  | Fair Value |  |  |  |  | Fair Value |
|  | Balance Sheet |  | December 31, |  |  | Balance Sheet |  | December 31, |
|  | Location |  | 2019 |  |  | 2018 |  |  | Location |  | 2019 |  |  | 2018 |
Derivatives designated as hedging instruments under ASC Topic 815 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange contracts |  | Prepaid and other current assets |  | $ | 5 |  |  | $ | 2 |  |  | Accrued liabilities |  | $ | 18 |  |  | $ | 17 |
Foreign exchange contracts |  | Other Assets |  |  | 4 |  |  |  | — |  |  | Other Liabilities |  |  | 2 |  |  |  | 11 |
Total derivatives designated as hedging instruments under ASC Topic 815 |  |  |  | $ | 9 |  |  | $ | 2 |  |  |  |  | $ | 20 |  |  | $ | 28 |
Derivatives not designated as hedging instruments under ASC Topic 815 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange contracts |  | Prepaid and other current assets |  | $ | 8 |  |  | $ | 4 |  |  | Accrued liabilities |  | $ | 6 |  |  | $ | 6 |
Foreign exchange contracts |  | Other Assets |  |  | 1 |  |  |  | — |  |  | Other Liabilities |  |  | — |  |  |  | 2 |
Total derivatives not designated as hedging instruments under ASC Topic 815 |  |  |  | $ | 9 |  |  | $ | 4 |  |  |  |  | $ | 6 |  |  | $ | 8 |
Total derivatives |  |  |  | $ | 18 |  |  | $ | 6 |  |  |  |  | $ | 26 |  |  | $ | 36 |

X
- Definition Outstanding foreign currency forward contracts. + References No definition available. + Details
Name: | nov_OutstandingForeignCurrencyForwardContractsTableTextBlock
Namespace Prefix: | nov_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration