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Note 11 - Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about intangible assets [abstract]

Disclosure of reconciliation of changes in intangible assets and goodwill [text block]

Year ended December 31, 2019		Information system projects				Licenses, patents and trademarks (*)				Goodwill				Customer relationships				Total
Cost
Values at the beginning of the year			580,622				464,571				2,085,936				2,058,859				5,189,988
Currency translation adjustment			(1,917	)			(70	)			(968	)			-				(2,955	)
Increase due to business combinations (***)			405				-				32,869				81,192				114,466
Additions			35,487				772				-				-				36,259
Transfers / Reclassifications			(4,665	)			-				-				-				(4,665	)
Disposals			(5,062	)			(1,531	)			-				-				(6,593	)
Values at the end of the year			604,870				463,742				2,117,837				2,140,051				5,326,500

Amortization and impairment
Accumulated at the beginning of the year			513,984				373,466				797,592				2,038,981				3,724,023
Currency translation adjustment			(1,734	)			-				-				-				(1,734	)
Amortization charge			28,937				719				-				18,259				47,915
Disposals			(4,850	)			(413	)			-				-				(5,263	)
Accumulated at the end of the year			536,337				373,772				797,592				2,057,240				3,764,941
At December 31, 2019			68,533				89,970				1,320,245				82,811				1,561,559

Year ended December 31, 2020		Information system projects				Licenses, patents and trademarks (*)				Goodwill				Customer relationships				Total

Cost
Values at the beginning of the year			604,870				463,742				2,117,837				2,140,051				5,326,500
Currency translation adjustment			1,108				220				(5,058	)			-				(3,730	)
Increase due to business combinations (**)			11,563				87,000				357,183				71,100				526,846
Additions			24,965				602				-				-				25,567
Transfers / Reclassifications			(1,393	)			-				-				-				(1,393	)
Disposals			(3,761	)			(1,064	)			-				-				(4,825	)
Values at the end of the year			637,352				550,500				2,469,962				2,211,151				5,868,965

Amortization and impairment
Accumulated at the beginning of the year			536,337				373,772				797,592				2,057,240				3,764,941
Currency translation adjustment			890				(1	)			-				-				889
Amortization charge			42,931				8,760				-				38,785				90,476
Impairment charge (See note 5)			-				-				586,402				-				586,402
Transfers / Reclassifications			931				-				-				-				931
Disposals			(3,730	)			-				-				-				(3,730	)
Accumulated at the end of the year			577,359				382,531				1,383,994				2,096,025				4,439,909
At December 31, 2020			59,993				167,969				1,085,968				115,126				1,429,056

Disclosure of information for cash-generating units [text block]

(all amounts in millions of U.S. dollars)
		Tubes Segment
CGU		Hydril Acquisition				Other				Total
Tamsa (Hydril and other)			346				19				365
Siderca (Hydril and other)			265				93				358
Hydril			309				-				309
Other			-				54				54
Total			920				166				1,086