Summary of Significant Accounting Policies (Details 1) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Jan. 01, 2012	Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Jan. 02, 2011	Oct. 03, 2010	Jul. 04, 2010	Apr. 04, 2010	Jan. 01, 2012	Jan. 02, 2011	Jan. 03, 2010
Computation of Basic and Diluted Earnings Per Share
Net income from continuing operations before noncontrolling interest	$ 36.7	$ 34.1	$ 38.8	$ 32.5	$ 37.0	$ 30.0	$ 28.0	$ 25.0	$ 142.1	$ 120.0	$ 116.4
Less: net income attributable to noncontrolling interest	0.1		(0.1)			(0.1)			0.1	(0.1)	(0.5)
Net income from continuing operations									142.1	119.9	115.9
Income (loss) from discontinued operations, net of income taxes			(0.2)	(0.5)	(0.4)	0.4	0.6		(0.7)	0.6	(2.6)
Gain on sale of discontinued operations, net of taxes			113.8						113.8
Net income attributable to Teledyne Technologies									$ 255.2	$ 120.5	$ 113.3
Basic earnings per share
Weighted average common shares outstanding									36.6	36.2	36.0
Basic earnings per share attributable to Teledyne Technologies:
- Continuing operations	$ 1.01	$ 0.93	$ 1.06	$ 0.89	$ 1.02	$ 0.83	$ 0.77	$ 0.69	$ 3.88	$ 3.31	$ 3.22
- Discontinued operations			$ 3.10	$ (0.01)	$ (0.01)	$ 0.01	$ 0.02		$ (0.02)	$ 0.02	$ (0.07)
Basic earnings per common share	$ 1.01	$ 0.93	$ 4.16	$ 0.88	$ 1.01	$ 0.84	$ 0.79	$ 0.69	$ 6.97	$ 3.33	$ 3.15
Diluted earnings per share
Weighted average common shares outstanding									36.6	36.2	36.0
Dilutive effect of contingently issuable shares									0.7	0.7	0.6
Weighted average common shares outstanding									37.3	36.9	36.6
Diluted earnings per common share
- Continuing operations	$ 0.99	$ 0.91	$ 1.04	$ 0.87	$ 1.00	$ 0.81	$ 0.76	$ 0.68	$ 3.81	$ 3.25	$ 3.17
- Discontinued operations			$ 3.04	$ (0.01)	$ (0.01)	$ 0.01	$ 0.02		$ (0.02)	$ 0.02	$ (0.07)
Diluted earnings per common share	$ 0.99	$ 0.91	$ 4.08	$ 0.86	$ 0.99	$ 0.82	$ 0.78	$ 0.68	$ 6.84	$ 3.27	$ 3.10

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Gain (loss) after tax expense or benefit, not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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