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Subsequent Event	6 Months Ended
Subsequent Event	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Event	Subsequent Events Effective June 4, 2019, Teledyne and 3M Company entered into a purchase agreement whereby Teledyne agreed to acquire the gas and flame detection business of 3M Company for $230.0 million in cash. The gas and flame detection business includes Oldham, Simtronics, Gas Measurement Instruments (GMI), Detcon and select Scott Safety products. The gas and flame detection business provides a portfolio of fixed and portable industrial gas and flame detection instruments used in a variety of industries including petrochemical, power generation, oil and gas, food and beverage, mining and waste water treatment. Principally located in France, Scotland and the United States, the acquired businesses will become part of the Instrumentation segment. The transaction is anticipated to close in the third quarter of 2019, and is subject to customary closing conditions, including French regulatory approval.