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v3.22.0.1

Segment reporting - Financial Segment Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Total Revenue |  |  |
Total Revenue | $ 5,720,438 | $ 5,349,083 | $ 5,501,241
Net sales | 5,590,438 | 5,237,443 | 5,374,207
Income Before Income Taxes |  |  |
Income Before Income Taxes | (160,982) | 255,592 | 380,766
Identifiable Assets |  |  |
Identifiable Assets | 5,073,235 | 5,277,259 | 5,126,289
Depreciation, Depletion and Amortization |  |  |
Depreciation, Depletion and Amortization | 239,086 | 255,359 | 239,140
Capital Expenditures |  |  |
Capital Expenditures | 256,019 | 194,127 | 195,934
Consumer Packaging |  |  |
Total Revenue |  |  |
Net sales | 2,368,347 | 2,229,859 | 2,208,574
Industrial Paper Packaging |  |  |
Total Revenue |  |  |
Net sales | 2,464,312 | 1,991,474 | 2,097,880
Operating segments | Consumer Packaging |  |  |
Total Revenue |  |  |
Total Revenue | 2,373,583 | 2,234,292 | 2,213,874
Net sales | 2,368,347 | 2,229,859 | 2,208,574
Income Before Income Taxes |  |  |
Income Before Income Taxes | 252,824 | 278,443 | 207,408
Identifiable Assets |  |  |
Identifiable Assets | 1,956,688 | 1,926,294 | 1,950,127
Depreciation, Depletion and Amortization |  |  |
Depreciation, Depletion and Amortization | 98,737 | 109,310 | 107,948
Capital Expenditures |  |  |
Capital Expenditures | 60,532 | 59,040 | 61,787
Operating segments | Industrial Paper Packaging |  |  |
Total Revenue |  |  |
Total Revenue | 2,578,379 | 2,090,731 | 2,208,871
Net sales | 2,464,312 | 1,991,474 | 2,097,880
Income Before Income Taxes |  |  |
Income Before Income Taxes | 218,345 | 176,809 | 244,982
Identifiable Assets |  |  |
Identifiable Assets | 1,971,293 | 1,805,388 | 1,736,734
Depreciation, Depletion and Amortization |  |  |
Depreciation, Depletion and Amortization | 96,084 | 94,801 | 86,861
Capital Expenditures |  |  |
Capital Expenditures | 150,225 | 87,549 | 112,852
Operating segments | All Other |  |  |
Total Revenue |  |  |
Total Revenue | 768,476 | 1,024,060 | 1,078,496
Net sales | 757,779 | 1,016,110 | 1,067,753
Income Before Income Taxes |  |  |
Income Before Income Taxes | 44,195 | 71,737 | 73,002
Identifiable Assets |  |  |
Identifiable Assets | 886,647 | 1,018,091 | 1,287,281
Depreciation, Depletion and Amortization |  |  |
Depreciation, Depletion and Amortization | 44,265 | 51,248 | 44,331
Capital Expenditures |  |  |
Capital Expenditures | 22,780 | 24,701 | 14,204
Eliminations |  |  |
Total Revenue |  |  |
Total Revenue | 130,000 | 111,640 | 127,034
Eliminations | Consumer Packaging |  |  |
Total Revenue |  |  |
Total Revenue | 5,236 | 4,433 | 5,300
Eliminations | Industrial Paper Packaging |  |  |
Total Revenue |  |  |
Total Revenue | 114,067 | 99,257 | 110,991
Eliminations | All Other |  |  |
Total Revenue |  |  |
Total Revenue | 10,697 | 7,950 | 10,743
Corporate |  |  |
Income Before Income Taxes |  |  |
Income Before Income Taxes | (676,346) | (271,397) | (144,626)
Identifiable Assets |  |  |
Identifiable Assets | 258,607 | 527,486 | 152,147
Depreciation, Depletion and Amortization |  |  |
Depreciation, Depletion and Amortization | 0 | 0 | 0
Capital Expenditures |  |  |
Capital Expenditures | $ 22,482 | $ 22,837 | $ 7,091

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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenuesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=son_ConsumerPackagingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=son_IndustrialPaperPackagingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=son_PaperAndIndustrialConvertedProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ConsolidationItemsAxis=srt_ConsolidationEliminationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |