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Goodwill and Other Intangible Assets (Schedule of goodwill) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2018
Goodwill [Line Items] |  |  |  |
Goodwill, impairment loss | $ 0 |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, beginning balance | 3,798,884,000 | $ 3,601,851,000 |  |
Accumulated impairments losses, beginning balance | (1,327,425,000) | (1,327,425,000) |  |
Goodwill | 2,520,966,000 | 2,471,459,000 | $ 2,274,426,000 |
Goodwill recognized during the year |  | 119,738,000 | 60,493,000 |
Currency translation during the year |  | (70,231,000) | 136,540,000 |
Goodwill, ending balance | 3,848,391,000 | 3,798,884,000 | 3,601,851,000 |
Accumulated impairments losses, ending balance | (1,327,425,000) | (1,327,425,000) | (1,327,425,000) |
Goodwill, net, ending balance | 2,520,966,000 | 2,471,459,000 | 2,274,426,000 |
Global Ceramic |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill recognized during the year | 19,821,000 |  |  |
Currency translation during the year | (22,706,000) |  |  |
Flooring NA |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill recognized during the year | 4,434,000 |  |  |
Currency translation during the year | 0 |  |  |
Flooring ROW |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill |  |  |  | $ 12,874,000
Goodwill recognized during the year | 95,483,000 |  |  |
Currency translation during the year | (47,525,000) |  |  |
Goodwill, net, ending balance |  |  |  | $ 12,874,000
Operating segments | Global Ceramic |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, beginning balance | 1,567,872,000 | 1,482,226,000 |  |
Accumulated impairments losses, beginning balance | (531,930,000) | (531,930,000) |  |
Goodwill | 1,033,057,000 | 1,035,942,000 | 950,296,000 |
Goodwill recognized during the year |  |  | 60,493,000 |
Currency translation during the year |  |  | 25,153,000 |
Goodwill, ending balance | 1,564,987,000 | 1,567,872,000 | 1,482,226,000 |
Accumulated impairments losses, ending balance | (531,930,000) | (531,930,000) | (531,930,000) |
Goodwill, net, ending balance | 1,033,057,000 | 1,035,942,000 | 950,296,000 |
Operating segments | Flooring NA |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, beginning balance | 869,764,000 | 869,764,000 |  |
Accumulated impairments losses, beginning balance | (343,054,000) | (343,054,000) |  |
Goodwill | 531,144,000 | 526,710,000 | 526,710,000 |
Goodwill recognized during the year |  |  | 0 |
Currency translation during the year |  |  | 0 |
Goodwill, ending balance | 874,198,000 | 869,764,000 | 869,764,000 |
Accumulated impairments losses, ending balance | (343,054,000) | (343,054,000) | (343,054,000) |
Goodwill, net, ending balance | 531,144,000 | 526,710,000 | 526,710,000 |
Operating segments | Flooring ROW |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, beginning balance | 1,361,248,000 | 1,249,861,000 |  |
Accumulated impairments losses, beginning balance | (452,441,000) | (452,441,000) |  |
Goodwill | 956,765,000 | 908,807,000 | 797,420,000 |
Goodwill recognized during the year |  |  | 0 |
Currency translation during the year |  |  | 111,387,000 |
Goodwill, ending balance | 1,409,206,000 | 1,361,248,000 | 1,249,861,000 |
Accumulated impairments losses, ending balance | (452,441,000) | (452,441,000) | (452,441,000) |
Goodwill, net, ending balance | $ 956,765,000 | $ 908,807,000 | $ 797,420,000 |

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