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Note 2 - Revenue Recognition - Disaggregation of Revenues, Percentage (Details)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Percentage of net sales	100.00%	100.00%
Specialty Metals Flat Products [Member]
Percentage of net sales	28.60%	27.30%
Carbon Flat Products [Member]
Percentage of net sales	54.60%	53.20%
Tubular and Pipe Products [Member]
Percentage of net sales	16.80%	19.50%
Hot Rolled Products [Member]
Percentage of net sales	30.30%	28.10%
Hot Rolled Products [Member] | Specialty Metals Flat Products [Member]
Percentage of net sales	0.00%	0.00%
Hot Rolled Products [Member] | Carbon Flat Products [Member]
Percentage of net sales	30.30%	28.10%
Hot Rolled Products [Member] | Tubular and Pipe Products [Member]
Percentage of net sales	0.00%	0.00%
Plate Products [Member]
Percentage of net sales	13.30%	8.70%
Plate Products [Member] | Specialty Metals Flat Products [Member]
Percentage of net sales	0.00%	0.00%
Plate Products [Member] | Carbon Flat Products [Member]
Percentage of net sales	13.30%	8.70%
Plate Products [Member] | Tubular and Pipe Products [Member]
Percentage of net sales	0.00%	0.00%
Cold Rolled Products [Member]
Percentage of net sales	5.00%	6.20%
Cold Rolled Products [Member] | Specialty Metals Flat Products [Member]
Percentage of net sales	0.00%	0.00%
Cold Rolled Products [Member] | Carbon Flat Products [Member]
Percentage of net sales	5.00%	6.20%
Cold Rolled Products [Member] | Tubular and Pipe Products [Member]
Percentage of net sales	0.00%	0.00%
Coated Products [Member]
Percentage of net sales	5.00%	8.80%
Coated Products [Member] | Specialty Metals Flat Products [Member]
Percentage of net sales	0.00%	0.00%
Coated Products [Member] | Carbon Flat Products [Member]
Percentage of net sales	5.00%	8.80%
Coated Products [Member] | Tubular and Pipe Products [Member]
Percentage of net sales	0.00%	0.00%
Specialty [Member]
Percentage of net sales	28.50%	25.60%
Specialty [Member] | Specialty Metals Flat Products [Member]
Percentage of net sales	28.50%	25.60%
Specialty [Member] | Carbon Flat Products [Member]
Percentage of net sales	0.00%	0.00%
Specialty [Member] | Tubular and Pipe Products [Member]
Percentage of net sales	0.00%	0.00%
Tube Products [Member]
Percentage of net sales	16.80%	19.50%
Tube Products [Member] | Specialty Metals Flat Products [Member]
Percentage of net sales	0.00%	0.00%
Tube Products [Member] | Carbon Flat Products [Member]
Percentage of net sales	0.00%	0.00%
Tube Products [Member] | Tubular and Pipe Products [Member]
Percentage of net sales	16.80%	19.50%
Product and Service, Other [Member]
Percentage of net sales	1.10%	3.10%
Product and Service, Other [Member] | Specialty Metals Flat Products [Member]
Percentage of net sales	0.10%	1.70%
Product and Service, Other [Member] | Carbon Flat Products [Member]
Percentage of net sales	1.00%	1.40%
Product and Service, Other [Member] | Tubular and Pipe Products [Member]
Percentage of net sales	0.00%	0.00%

X

- Definition

Percentage of revenue, including tax collected from customer, from satisfaction of performance obligation by transferring promised good or service to customer.

+ References

No definition available.

+ Details

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Namespace Prefix:	zeus_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
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X

- Details

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X

- Details

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X

- Details

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X

- Details

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X

- Details

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X

- Details

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Period Type:

X

- Details

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X

- Details

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X

- Details

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