Investments in and Advances to Affiliates (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Investments [Line Items]
Revenue from affiliates	$ 21.0	$ 12.0	$ 17.0
Expenses from affiliates	73.0	70.0	58.0
Due from affiliates	7.0	4.0
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Unconsolidated Subsidiaries	4.0	11.0
Income from affiliates, classified in cost of sales	$ (4.0)	$ (11.0)	$ (2.0)
Resolute Forest Products Inc. [Member]
Schedule of Investments [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	50.00%

Income (Loss) from Equity Method Investments, classified in cost of sales

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- Definition

This element represents disclosure of the aggregate cash dividends paid to the entity by unconsolidated subsidiaries.

+ References

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-Publisher FASB
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- Definition

The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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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.

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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.

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