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Acquisitions and Dispositions (Narrative) (Details) |  |  |  |  | 3 Months Ended | 12 Months Ended |
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Nov. 30, 2016 USD ($) | Aug. 29, 2016 USD ($) facility | Apr. 01, 2015 USD ($) | Apr. 28, 2014 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | [2] | Jun. 30, 2016 USD ($) | [3] | Mar. 31, 2016 USD ($) | [4] | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | [6] | Jun. 30, 2015 USD ($) | [7] | Mar. 31, 2015 USD ($) | [8] | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  | $ 1,476,600,000 | [1] | $ 1,484,000,000 | $ 1,417,400,000 | $ 1,401,000,000 | $ 1,390,900,000 | [5] | $ 1,470,800,000 | $ 1,454,300,000 | $ 1,425,700,000 | $ 5,779,000,000 | $ 5,741,700,000 | $ 5,852,600,000 |
Goodwill |  |  |  |  | 737,900,000 |  |  |  |  | 544,000,000 |  |  |  |  | 737,900,000 | 544,000,000 |  | $ 546,800,000
TimBar Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of production facilities acquired | facility |  | 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid |  | $ 386,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  | $ 385,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, term |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 116,900,000 |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |
Useful life of acquired intangibles |  | 14 years 2 months 18 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 148,100 |  |  | 157,300 |  |  |  |  |  |  |  |  |  | $ 157,300 |  |  |
Intangible assets |  | 101,600 |  |  | 94,400 |  |  |  |  |  |  |  |  |  | 94,400 |  |  |
Property, plant and equipment |  | 96,900 |  |  | 95,300 |  |  |  |  |  |  |  |  |  | 95,300 |  |  |
Other net assets |  | $ 39,000 |  |  | 38,600 |  |  |  |  |  |  |  |  |  | 38,600 |  |  |
TimBar Corporation | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of asset (in years) |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TimBar Corporation | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of asset (in years) |  | 24 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Columbus Container Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid | $ 99,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life of acquired intangibles | 14 years 4 months 24 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ 36,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets | 26,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment | 27,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other net assets | $ 9,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Columbus Container Inc | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of asset (in years) | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Columbus Container Inc | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of asset (in years) | 32 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wholesale Distributor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding stock and voting equity interests acquired |  | 51.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Packaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 682,700,000 |  |  |  |  | $ 488,800,000 |  |  |  |  | $ 682,700,000 | $ 488,800,000 |  | $ 491,600,000
Packaging | Crockett Packaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, cost of acquired entity |  |  |  | $ 21,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Working capital adjustments |  |  |  | $ 700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hexacomb Europe and Mexico | Packaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of business net of cash divested |  |  | $ 23,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Includes $4.5 million of closure costs related to a corrugated products facility and a paper products facility ($2.9 million after-tax or $0.03 per diluted share), $2.7 million of costs related to ceased production of softwood market pulp operations at our Wallula, Washington mill and the permanent shutdown of the No.1 machine ($1.8 million after-tax or $0.02 per diluted share), and $1.2 million of acquisition-related costs for TimBar Corporation and Columbus Container, Inc. acquisitions ($0.8 million after-tax or $0.01 per diluted share).
[2] | Includes $2.0 million of closure costs related to a corrugated products facility and a paper products facility ($1.4 million after-tax or $0.02 per diluted share) and $2.9 million of acquisition-related costs for TimBar Corporation and Columbus Container, Inc. acquisitions ($1.9 million after-tax or $0.02 per diluted share).
[3] | Includes $1.7 million of closure costs related to a corrugated products facility and a paper products facility ($1.0 million after-tax or $0.01 per diluted share), $0.3 million of acquisition-related costs for TimBar Corporation ($0.2 million after-tax or $0.0 per diluted share), and $0.9 million related to our withdrawal from a multiemployer pension plan for one of our corrugated products facilities ($0.6 million after-tax or $0.01 per diluted share).
[4] | Includes $2.8 million of closure costs related to a corrugated products facility and a paper products facility. ($1.9 million after-tax or $0.02 per diluted share).
[5] | Includes $3.5 million of income from DeRidder restructuring ($2.2 million after-tax or $0.02 per diluted share) and $3.8 million of integration-related and other costs ($2.6 million after-tax or $0.03 per diluted share).
[6] | Includes $3.8 million of income from DeRidder restructuring ($2.3 million after-tax or $0.02 per diluted share) and $2.4 million of integration-related and other costs ($1.7 million after-tax or $0.02 per diluted share). Also includes $6.7 million gain from the sale of our paper mill site at St. Helens, Oregon ($4.4 million after tax or $0.05 per diluted share).
[7] | Includes $1.0 million of income from DeRidder restructuring ($0.7 million after-tax or $0.01 per diluted share) and $3.7 million of integration-related and other costs ($2.3 million after-tax or $0.03 per diluted share).
[8] | Includes $10.3 million of DeRidder restructuring charges ($6.6 million after-tax or $0.07 per diluted share) and $3.5 million of integration-related and other costs ($2.2 million after-tax or $0.02 per diluted share). Also includes a $3.6 million tax credit from the State of Louisiana related to our capital investment and the jobs retained at the DeRidder, Louisiana mill.

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