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Note 5 - Impairment charge - Additional impairment with the change in key assumptions (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
OCTG (USA) [member] | Discount rate, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | $ (60)
OCTG (USA) [member] | Growth rate, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | (43)
OCTG (USA) [member] | Projected change rate in future cash flows, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | (16)
IPSCO [Member] | Discount rate, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | (117)
IPSCO [Member] | Growth rate, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | (77)
IPSCO [Member] | Projected change rate in future cash flows, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | (41)
Coiled Tubing [member] | Discount rate, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | (12)
Coiled Tubing [member] | Growth rate, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | (6)
Coiled Tubing [member] | Projected change rate in future cash flows, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | (5)
Rods USA [Member] | Discount rate, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | (5)
Rods USA [Member] | Growth rate, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | (3)
Rods USA [Member] | Projected change rate in future cash flows, measurement input [member] |
Disclosure of impairment loss recognised or reversed for cash-generating unit [line items] |
Additional impairment due to reasonably possible increase (decrease) in key assumption | $ (2)

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of additional impairment due to reasonably possible increase (decrease) in key assumption. + References No definition available. + Details
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Period Type: | duration

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- Details
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Balance Type: |
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- Details
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- Details
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Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |