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2012 Separation Transaction (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 30, 2012	Mar. 30, 2012	Mar. 28, 2012	Sep. 19, 2011 entity
2012 Separation Transaction
Number of companies after separation				3
Tyco shareholders ownership interest in new companies (as a percent)			52.50%
Ownership interest of non-controlling owners (as a percent)			47.50%
Separation costs	$ 66	$ 98
Asset impairment charges related to the separation		23
Restructuring charges related to the separation		$ 2

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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- Definition

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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