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Goodwill and intangible assets - Schedule of goodwill (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 28, 2019 | Dec. 31, 2018
Goodwill [Roll Forward] |  |
Goodwill, gross, beginning balance | $ 3,848,391 |
Accumulated impairment losses | (1,327,425) | $ (1,327,425)
Goodwill, net, beginning balance | 2,520,966 |
Goodwill recognized during the period | 45,785 |
Currency translation during the period | (47,537) |
Goodwill, gross, ending balance | 3,846,639 |
Accumulated impairment losses | (1,327,425) | (1,327,425)
Goodwill, net, ending balance | 2,519,214 |
Global Ceramic segment |  |
Goodwill [Roll Forward] |  |
Goodwill, gross, beginning balance | 1,564,987 |
Accumulated impairment losses | (531,930) | (531,930)
Goodwill, net, beginning balance | 1,033,057 |
Goodwill recognized during the period | (1,758) |
Currency translation during the period | (2,740) |
Goodwill, gross, ending balance | 1,560,489 |
Accumulated impairment losses | (531,930) | (531,930)
Goodwill, net, ending balance | 1,028,559 |
Flooring NA segment |  |
Goodwill [Roll Forward] |  |
Goodwill, gross, beginning balance | 874,198 |
Accumulated impairment losses | (343,054) | (343,054)
Goodwill, net, beginning balance | 531,144 |
Goodwill recognized during the period | 0 |
Currency translation during the period | 0 |
Goodwill, gross, ending balance | 874,198 |
Accumulated impairment losses | (343,054) | (343,054)
Goodwill, net, ending balance | 531,144 |
Flooring ROW segment |  |
Goodwill [Roll Forward] |  |
Goodwill, gross, beginning balance | 1,409,206 |
Accumulated impairment losses | (452,441) | (452,441)
Goodwill, net, beginning balance | 956,765 |
Goodwill recognized during the period | 47,543 |
Currency translation during the period | (44,797) |
Goodwill, gross, ending balance | 1,411,952 |
Accumulated impairment losses | (452,441) | $ (452,441)
Goodwill, net, ending balance | $ 959,511 |

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