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Business Segment Information - Major customers (Details) - segment | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Major Customers |  |  |
Number of reportable segments | 4 |  |
Net sales. | Customer concentration | Anheuser-Busch InBev and affiliates |  |  |
Major Customers |  |  |
Percentage of consolidated net sales | 12.00% | 13.00% | 14.00%
Net sales. | Customer concentration | Coca-Cola Bottlers' Sales & Services Company LLC and affiliates |  |  |
Major Customers |  |  |
Percentage of consolidated net sales | 9.00% | 12.00% | 11.00%
Net sales. | Customer concentration | U.S. Government |  |  |
Major Customers |  |  |
Percentage of consolidated net sales | 13.00% | 10.00% | 9.00%

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