2012 Separation Transaction (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Jun. 29, 2012	Jun. 29, 2012	Sep. 19, 2011 entity	Mar. 28, 2012 Pentair, Inc.
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%
Selling, general and administrative expenses ("SG&A")	$ 4	$ 4
Separation costs	61	159
Restructuring, asset impairments and divestiture charges (gains), net	4	29
Interest expense (see Note 9)	3	3
Total separation related charges	$ 72	$ 195