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Comprehensive Income - Accumulated Other Comprehensive Income and Comprehensive Income Components (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 30, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 31, 2016 | Sep. 24, 2016 | Jun. 25, 2016 | Mar. 26, 2016 | Dec. 30, 2017 | Dec. 31, 2016 | Dec. 26, 2015
Attributable to Redeemable noncontrolling interests: |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustment | $ (5,564) |  |  |  | $ (13,025) |  |  |  | $ (5,564) | $ (13,025) | $ (10,373)
Attributable to noncontrolling interests: |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustment | 539 |  |  |  | (113) |  |  |  | 539 | (113) | (76)
Attributable to Henry Schein, Inc.: |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation gain (loss) | (112,439) |  |  |  | (296,212) |  |  |  | (112,439) | (296,212) | (200,499)
Unrealized gain (loss) from foreign currency hedging activities | (782) |  |  |  | (53) |  |  |  | (782) | (53) | 939
Unrealized investment gain (loss) | (3) |  |  |  | 0 |  |  |  | (3) | 0 | (2)
Pension adjustment gain (loss) | (16,843) |  |  |  | (20,776) |  |  |  | (16,843) | (20,776) | (20,377)
Accumulated other comprehensive income (loss) | (130,067) |  |  |  | (317,041) |  |  |  | (130,067) | (317,041) | (219,939)
Total Accumulated other comprehensive income (loss) | (135,092) |  |  |  | (330,179) |  |  |  | (135,092) | (330,179) | (230,388)
Components of comprehensive income [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net income | $ 8,510 | $ 150,948 | $ 149,582 | $ 150,253 | $ 153,473 | $ 145,291 | $ 133,098 | $ 124,533 | 459,293 | 556,395 | 523,427
Foreign currency translation gain (loss) |  |  |  |  |  |  |  |  | 191,886 | (98,402) | (134,035)
Tax effect |  |  |  |  |  |  |  |  | 0 | 0 | 0
Foreign currency translation gain (loss) |  |  |  |  |  |  |  |  | 191,886 | (98,402) | (134,035)
Unrealized gain (loss) from foreign currency hedging activities |  |  |  |  |  |  |  |  | (1,515) | (1,025) | 2,147
Tax effect |  |  |  |  |  |  |  |  | 786 | 33 | (153)
Unrealized gain (loss) from foreign currency hedging activities |  |  |  |  |  |  |  |  | (729) | (992) | 1,994
Unrealized investment gain (loss) |  |  |  |  |  |  |  |  | (4) | 2 | 134
Tax effect |  |  |  |  |  |  |  |  | 1 | 0 | 0
Unrealized investment gain (loss) |  |  |  |  |  |  |  |  | (3) | 2 | 134
Pension adjustment gain (loss) |  |  |  |  |  |  |  |  | 4,247 | (947) | 3,278
Tax effect |  |  |  |  |  |  |  |  | (314) | 548 | (1,008)
Pension adjustment gain (loss) |  |  |  |  |  |  |  |  | 3,933 | (399) | 2,270
Comprehensive income |  |  |  |  |  |  |  |  | $ 654,380 | $ 456,604 | $ 393,790

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- Definition Accumulated adjustment attributable to nonredeemable noncontrolling interests, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains (losses). + References No definition available. + Details
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