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Business segments and other information - segment result (Detail) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 USD ($) | Oct. 01, 2017 USD ($) | Jul. 02, 2017 USD ($) | Apr. 02, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 25, 2016 USD ($) | Jun. 26, 2016 USD ($) | Mar. 27, 2016 USD ($) | Dec. 31, 2017 USD ($) segment | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  | 7 |  |
Revenue | $ 595,106 | $ 534,703 | $ 528,613 | $ 487,881 | $ 513,933 | $ 455,648 | $ 473,553 | $ 424,893 | $ 2,146,303 | $ 1,868,027 | $ 1,809,690
Operating Profit |  |  |  |  |  |  |  |  | 372,279 | 319,453 | 315,891
Depreciation and Amortization |  |  |  |  |  |  |  |  | 160,338 | 128,346 | 125,334
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Profit |  |  |  |  |  |  |  |  | 450,627 | 422,827 | 387,855
Segment Reconciling Items |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Profit |  |  |  |  |  |  |  |  | (78,348) | (103,374) | (71,964)
Vascular North America |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 313,618 | 295,206 | 284,097
Depreciation and Amortization |  |  |  |  |  |  |  |  | 31,058 | 35,117 | 35,259
Vascular North America | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Profit |  |  |  |  |  |  |  |  | 77,036 | 77,122 | 59,441
Interventional North America |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 220,611 | 82,431 | 75,196
Operating Profit |  |  |  |  |  |  |  |  | 25,972 | 13,264 | 5,800
Depreciation and Amortization |  |  |  |  |  |  |  |  | 29,108 | 6,993 | 7,823
Anesthesia North America |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 197,982 | 198,772 | 189,297
Operating Profit |  |  |  |  |  |  |  |  | 62,901 | 55,544 | 48,311
Depreciation and Amortization |  |  |  |  |  |  |  |  | 8,573 | 10,932 | 7,089
Surgical North America |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 175,216 | 172,223 | 161,230
Depreciation and Amortization |  |  |  |  |  |  |  |  | 8,694 | 10,459 | 12,289
Surgical North America | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Profit |  |  |  |  |  |  |  |  | 63,931 | 56,608 | 52,529
EMEA |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 552,722 | 510,934 | 514,443
Depreciation and Amortization |  |  |  |  |  |  |  |  | 34,322 | 30,505 | 32,178
EMEA | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Profit |  |  |  |  |  |  |  |  | 92,430 | 84,392 | 92,326
Asia |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 269,208 | 249,416 | 241,726
Depreciation and Amortization |  |  |  |  |  |  |  |  | 11,868 | 11,275 | 11,382
Asia | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Profit |  |  |  |  |  |  |  |  | 75,637 | 75,770 | 67,887
OEM |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 182,967 | 160,990 | 149,399
Depreciation and Amortization |  |  |  |  |  |  |  |  | 8,337 | 8,404 | 6,834
OEM | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Profit |  |  |  |  |  |  |  |  | 41,578 | 33,641 | 33,162
All Other |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 233,979 | 198,055 | 194,302
Depreciation and Amortization |  |  |  |  |  |  |  |  | 28,378 | 14,661 | 12,480
All Other | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Revenues From External Customers And Long Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Profit |  |  |  |  |  |  |  |  | $ 11,142 | $ 26,486 | $ 28,399

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