Income Taxes (Deferred Income Tax) (Details) (USD $) In Millions, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013
Current:
Accrued liabilities	$ 20.3	$ 14.6
Inventory valuation	14.3	11.2
Accrued vacation	11.4	11.3
Deferred compensation and other benefits plans	0.9	1.0
Intangible amortization	0.6	0.7
Other	(0.9)tdy_DeferredTaxAssetsOtherCurrent	(0.3)tdy_DeferredTaxAssetsOtherCurrent
Valuation allowance	(2.9)	(5.8)
Long-term:
Postretirement benefits other than pensions	5.9	5.3
Accrued liabilities	12.5	13.0
Deferred compensation and other benefit plans	11.4	0
Tax credit and NOL carryforward amounts	53.5	64.5
Other	0tdy_DeferredTaxAssetsOtherNoncurrent	1.2tdy_DeferredTaxAssetsOtherNoncurrent
Valuation allowance	(20.3)	(20.2)
Total deferred income tax assets	108.5us-gaap_DeferredTaxAssetsNet	97.1us-gaap_DeferredTaxAssetsNet
Current:
Other items	2.7us-gaap_DeferredTaxLiabilitiesOther	1.4us-gaap_DeferredTaxLiabilitiesOther
Long-term:
Property, plant and equipment differences	28.8	28.8
Deferred compensation and other benefit plans	0	48.2
Intangible amortization	111.5	98.8
Other	0	0.3
Total deferred income tax liabilities	143.0us-gaap_DeferredIncomeTaxLiabilities	177.5us-gaap_DeferredIncomeTaxLiabilities
Net deferred income tax liabilities	$ (34.5)us-gaap_DeferredTaxAssetsLiabilitiesNet	$ (80.4)us-gaap_DeferredTaxAssetsLiabilitiesNet

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