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SUPPLEMENTARY INFORMATION RELATING TO THE NATURE OF EXPENSES (Government assistance) (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Jan. 01, 2017
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Analysis of income and expense [abstract] |  |
Government assistance | $ 10.2 | $ 9.3

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- Definition Income From Government Grants And Tax Credits + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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