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Segment reporting (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 28, 2019 USD ($) | Sep. 29, 2018 USD ($) | Sep. 28, 2019 USD ($) segment | Sep. 29, 2018 USD ($) | Dec. 31, 2018 USD ($)
Segment Reporting [Abstract] |  |  |  |  |
Number of reportable segments | segment |  |  | 3 |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | $ 2,519,185 | $ 2,545,800 | $ 7,546,160 | $ 7,535,016 |
Operating income (loss) | 240,220 | 287,244 | 672,410 | 881,950 |
Assets | 13,392,762 |  | 13,392,762 |  | $ 13,099,123
Global Ceramic segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 916,422 | 885,773 | 2,772,805 | 2,691,618 |
Flooring NA segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 1,001,908 | 1,047,540 | 2,907,327 | 3,055,468 |
Flooring ROW segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 600,855 | 612,487 | 1,866,028 | 1,787,930 |
Operating segments | Global Ceramic segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 916,422 | 885,773 | 2,772,805 | 2,691,618 |
Operating income (loss) | 84,410 | 118,716 | 286,886 | 366,893 |
Assets | 5,385,279 |  | 5,385,279 |  | 5,194,030
Operating segments | Flooring NA segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 1,001,908 | 1,047,540 | 2,907,327 | 3,055,468 |
Operating income (loss) | 80,223 | 93,369 | 140,374 | 268,779 |
Assets | 4,020,205 |  | 4,020,205 |  | 3,938,639
Operating segments | Flooring ROW segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 600,855 | 612,487 | 1,866,028 | 1,787,930 |
Operating income (loss) | 84,428 | 84,108 | 276,392 | 273,334 |
Assets | 3,736,296 |  | 3,736,296 |  | 3,666,617
Intersegment sales |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 0 | 0 | 0 | 0 |
Corporate and intersegment eliminations |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income (loss) | (8,841) | $ (8,949) | (31,242) | $ (27,056) |
Assets | $ 250,982 |  | $ 250,982 |  | $ 299,837

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