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Schedule II - Valuation Reserves (Details) - Valuation Reserves - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 30, 2018 | Dec. 31, 2017 | Jan. 01, 2017
Allowance for doubtful accounts |  |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at beginning of year |  | $ 12.9 | $ 12.5 | $ 10.5
Charged to costs and expenses |  | 3.5 | 5.3 | 10.2
Charged to other accounts | [1] | (0.5) | 0.3 | 0.8
Currency exchange effects |  | (0.4) | 0.6 | (0.8)
Deductions from reserves |  | (2.3) | (5.8) | (8.2)
Balance at end of year |  | 13.2 | 12.9 | 12.5
Deferred tax assets valuation allowance |  |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance at beginning of year |  | 34.6 | 42.1 | 50.9
Charged to costs and expenses |  | 2.6 | 1.7 | 2.4
Charged to other accounts |  | 0.0 | 0.0 | 0.0
Currency exchange effects |  | (1.8) | 3.3 | (2.9)
Deductions from reserves |  | (7.6) | (12.5) | (8.3)
Balance at end of year |  | $ 27.8 | $ 34.6 | $ 42.1
[1] | Adjustment to provision for sales allowances charged to revenue from services.

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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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