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Investments - Equity Method Investments (Details) $ in Millions	3 Months Ended						12 Months Ended
	Dec. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jul. 01, 2018 USD ($)	Apr. 01, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 CAD ($)	Dec. 29, 2019 USD ($)	Dec. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Schedule of Equity Method Investments [Line Items]
Investments in joint ventures					$ 1,700,000		$ 0		$ 1,700,000
Gain/(loss) from joint ventures	$ 10,773,000	$ (16,000)	$ (8,000)	$ 15,000			0	$ 10,764,000	18,641,000
Newsprint and supercalendered paper purchased from the Paper Mills							11,000,000
Non-marketable equity securities	$ 13,700,000						13,400,000	13,700,000
Investment income in interest expense							21,580,000	14,510,000	$ 9,897,000
Donohue Malbaie Inc.
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage					49.00%				49.00%
Gain/(loss) from joint ventures					$ (6,400,000)
Distributions received					$ 15,600,000	$ 20	0	0	$ 0
Madison Paper Industries
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage					40.00%				40.00%
Gain/(loss) from joint ventures							$ 0	10,800,000	$ 18,600,000
Madison Paper Industries Owned Consolidated Subsidiary
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage							80.00%
Ownership of Madison Paper Industries by Consolidated Subsidiary [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage							50.00%
Resolute FP Canada, Inc. \| Donohue Malbaie Inc.
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage							51.00%
UPM-Kymmene \| Madison Paper Industries
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage							60.00%
Madison Paper Industries
Schedule of Equity Method Investments [Line Items]
Gain on sale of assets								11,300,000	20,800,000
Distributions received							$ 0	$ 12,500,000	$ 0
Madison Paper Industries \| Madison Paper Industries
Schedule of Equity Method Investments [Line Items]
Equity method investment, noncontrolling interest, ownership percentage							10.00%
Madison Paper Industries \| Madison Paper Industries Owned Consolidated Subsidiary
Schedule of Equity Method Investments [Line Items]
Equity method investment, noncontrolling interest, ownership percentage							20.00%