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Segment Reporting, Revenue by Brand Portfolio (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Oct. 01, 2017 | Jul. 02, 2017 | Apr. 02, 2017 | Dec. 25, 2016 | Sep. 25, 2016 | Jun. 26, 2016 | Mar. 27, 2016 | Dec. 31, 2017 | Dec. 25, 2016 | Dec. 27, 2015
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues | $ 1,596,111 | $ 1,791,502 | $ 972,506 | $ 849,663 | $ 1,629,940 | $ 1,679,757 | $ 878,945 | $ 831,180 | $ 5,209,782 | $ 5,019,822 | $ 4,447,509
Franchise Brands [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 2,567,962 | 2,327,668 | 2,285,414
Partner Brands [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 1,271,597 | 1,412,770 | 1,101,305
Hasbro Gaming [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | 893,019 | 813,433 | 662,319
Emerging Brands [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  | $ 477,204 | $ 465,951 | $ 398,471

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