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Goodwill and intangible assets - Schedule of goodwill (Details) $ in Thousands | 6 Months Ended
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Jul. 01, 2017 USD ($)
Goodwill [Roll Forward] |
Goodwill, gross, beginning balance | $ 3,601,851
Accumulated impairment losses | (1,327,425)
Goodwill, net, beginning balance | 2,274,426
Goodwill recognized or adjusted during the period | 59,829
Currency translation during the period | 82,803
Goodwill, gross, ending balance | 3,744,483
Accumulated impairment losses | (1,327,425)
Goodwill, net, ending balance | 2,417,058
Operating segments | Global Ceramic segment |
Goodwill [Roll Forward] |
Goodwill, gross, beginning balance | 1,482,226
Accumulated impairment losses | (531,930)
Goodwill, net, beginning balance | 950,296
Goodwill recognized or adjusted during the period | 59,829
Currency translation during the period | 14,348
Goodwill, gross, ending balance | 1,556,403
Accumulated impairment losses | (531,930)
Goodwill, net, ending balance | 1,024,473
Operating segments | Flooring NA segment |
Goodwill [Roll Forward] |
Goodwill, gross, beginning balance | 869,764
Accumulated impairment losses | (343,054)
Goodwill, net, beginning balance | 526,710
Goodwill recognized or adjusted during the period | 0
Currency translation during the period | 0
Goodwill, gross, ending balance | 869,764
Accumulated impairment losses | (343,054)
Goodwill, net, ending balance | 526,710
Operating segments | Flooring ROW segment |
Goodwill [Roll Forward] |
Goodwill, gross, beginning balance | 1,249,861
Accumulated impairment losses | (452,441)
Goodwill, net, beginning balance | 797,420
Goodwill recognized or adjusted during the period | 0
Currency translation during the period | 68,455
Goodwill, gross, ending balance | 1,318,316
Accumulated impairment losses | (452,441)
Goodwill, net, ending balance | $ 865,875

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