The percentage of common stock and preferred stock of the company owned by a related party.

No definition available.

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- Definition

Equity Method Investment, Number of Payments

+ References

No definition available.

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- Definition

Equity Method Investment, Payment Receivable

+ References

No definition available.

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- Definition

Related Party, Number Of Metric Tonnes

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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-Topic 275
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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- Definition

Portion of the carrying amount as of the balance sheet date of obligations due all related parties that is payable after one year or beyond the normal operating cycle if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
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-Publisher FASB
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-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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- Definition

The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence.

+ References

No definition available.

+ Details

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

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Balance Type:	debit
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
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-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

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Related Party Transactions - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended		7 Months Ended
	Jun. 30, 2019 USD ($) T	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) T	Jun. 30, 2018 USD ($)	Dec. 31, 2019 USD ($)	May 22, 2019 payment	Apr. 29, 2019 USD ($)
Related Party Transaction [Line Items]
Ownership percentage by noncontrolling owners	42.90%		42.90%
Economic ownership percentage by related party	47.00%		47.00%
Related parties	$ 305.0	$ 282.7	$ 616.4	$ 579.0
Payments receivable	10.6		10.6
BHH [Member] \| GQQ [Member]
Related Party Transaction [Line Items]
Ownership percentage						40.00%
Number of payments \| payment						2
Loss on sale of equity investments	4.3
Glencore [Member]
Related Party Transaction [Line Items]
Related parties	305.0	$ 282.7	616.4	$ 579.0
Hawesville [Member]
Related Party Transaction [Line Items]
Term loan - less current portion							$ 40.0
Aluminum [Member] \| Glencore [Member]
Related Party Transaction [Line Items]
Related parties	$ 13.6		$ 21.8
Number of metric tonnes \| T	37,904		59,769
Consolidated Sales [Member] \| Customer Concentration Risk [Member] \| Glencore [Member]
Related Party Transaction [Line Items]
Major customer, percentage of revenue, net (percent)	64.50%	60.10%	64.00%	62.60%
Forecast [Member] \| BHH [Member] \| GQQ [Member]
Related Party Transaction [Line Items]
Consideration					$ 144.9