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Goodwill and other intangible assets - changes in carrying amount by reporting segment (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Goodwill [Line Items] |  |  |
Goodwill |  |  | $ 1,608,848
Accumulated impairment losses |  |  | (332,128)
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | $ 2,235,592 | $ 1,276,720 |
Goodwill related to acquisitions | 40,665 | 893,711 |
Translation and other adjustments | (29,678) | 65,161 |
Goodwill, ending balance | 2,246,579 | 2,235,592 |
Vascular North America |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  |  | 485,986
Accumulated impairment losses |  |  | (219,527)
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 264,869 | 266,459 |
Goodwill related to acquisitions | 0 | 0 |
Translation and other adjustments | 0 | (1,590) |
Goodwill, ending balance | 264,869 | 264,869 |
Interventional North America |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  |  | 84,615
Accumulated impairment losses |  |  | (5,528)
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 433,049 | 79,087 |
Goodwill related to acquisitions | 27,355 | 342,901 |
Translation and other adjustments | (4,815) | 11,061 |
Goodwill, ending balance | 455,589 | 433,049 |
Anesthesia North America |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  |  | 225,784
Accumulated impairment losses |  |  | (84,531)
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 157,289 | 141,253 |
Goodwill related to acquisitions | 0 | 15,599 |
Translation and other adjustments | (950) | 437 |
Goodwill, ending balance | 156,339 | 157,289 |
Surgical North America |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  |  | 250,912
Accumulated impairment losses |  |  | 0
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 250,912 | 250,912 |
Goodwill related to acquisitions | 2,403 | 0 |
Translation and other adjustments | 0 | 0 |
Goodwill, ending balance | 253,315 | 250,912 |
EMEA |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  |  | 290,041
Accumulated impairment losses |  |  | 0
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 494,548 | 290,041 |
Goodwill related to acquisitions | 4,730 | 161,543 |
Translation and other adjustments | (18,663) | 42,964 |
Goodwill, ending balance | 480,615 | 494,548 |
Asia |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  |  | 138,185
Accumulated impairment losses |  |  | 0
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 209,200 | 138,185 |
Goodwill related to acquisitions | 6,590 | 59,954 |
Translation and other adjustments | (4,243) | 11,061 |
Goodwill, ending balance | 211,547 | 209,200 |
OEM |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  |  | 4,883
Accumulated impairment losses |  |  | 0
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 4,883 | 4,883 |
Goodwill related to acquisitions | 0 | 0 |
Translation and other adjustments | 0 | 0 |
Goodwill, ending balance | 4,883 | 4,883 |
All other |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  |  | 128,442
Accumulated impairment losses |  |  | $ (22,542)
Goodwill [Roll Forward] |  |  |
Goodwill, beginning balance | 420,842 | 105,900 |
Goodwill related to acquisitions | (413) | 313,714 |
Translation and other adjustments | (1,007) | 1,228 |
Goodwill, ending balance | $ 419,422 | $ 420,842 |

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