Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 29, 2013	Mar. 30, 2012	Mar. 29, 2013	Mar. 30, 2012
Income
Income from continuing operations	$ 74	$ 134	$ 233	$ 232
Income from continuing operations attributable to Tyco common shareholders, giving effect to dilutive adjustments	$ 74	$ 134	$ 233	$ 232
Shares
Income from continuing operations (in shares)	466	463	466	463
Share options and restricted share awards	8	6	7	6
Income from continuing operations attributable to Tyco common shareholders, giving effect to dilutive adjustments (in shares)	474	469	473	469
Per Share Amount
Income from continuing operations (in dollars per share)	$ 0.16	$ 0.29	$ 0.50	$ 0.50
Income from continuing operations attributable to Tyco common shareholders, giving effect to dilutive adjustments (in dollars per share)	$ 0.16	$ 0.29	$ 0.49	$ 0.50
Stock Options
Earnings Per Share
Stock options and restricted stock excluded from the computation of earnings per share	4	4	5	6
Restricted stock units
Earnings Per Share
Stock options and restricted stock excluded from the computation of earnings per share	1		1