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Cash and Cash Equivalents and Advertising Accounting Policies, and Prior Year Reclassifications (Effect Of Reclassification Of Consolidated Statements Of Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 29, 2018 | Sep. 29, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 30, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Cost of sales, including advertising, warehousing and distribution expenses |  |  |  |  |  |  |  |  | $ 2,574,269 | $ 2,554,284 | $ 2,273,182
Gross profit on sales | $ 227,459 | $ 232,340 | $ 240,295 | $ 234,907 | $ 230,120 | $ 219,609 | $ 233,758 | $ 229,036 | 935,001 | 912,523 | 863,538
Operating, general and administrative expenses |  |  |  |  |  |  |  |  | $ 851,411 | 836,098 | 765,213
As Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |
Cost of sales, including advertising, warehousing and distribution expenses |  |  |  |  |  |  |  |  |  | 2,540,348 | 2,264,565
Gross profit on sales |  |  |  |  |  |  |  |  |  | 926,459 | 872,155
Operating, general and administrative expenses |  |  |  |  |  |  |  |  |  | 850,034 | 773,830
Reclassifications [Member] |  |  |  |  |  |  |  |  |  |  |
Cost of sales, including advertising, warehousing and distribution expenses |  |  |  |  |  |  |  |  |  | 13,936 | 8,617
Gross profit on sales |  |  |  |  |  |  |  |  |  | (13,936) | (8,617)
Operating, general and administrative expenses |  |  |  |  |  |  |  |  |  | $ (13,936) | $ (8,617)

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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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- Definition Cost of sales consists of direct product costs (net of discounts and allowances), warehouse costs, transportation costs and manufacturing facility costs. Also included are vendor allowances recorded as credits in cost of sales. + References No definition available. + Details
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