Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Dec. 26, 2014	Dec. 27, 2013
Income
Income from continuing operations	$ 163	$ 246
Income from continuing operations attributable to Tyco common shareholders, giving effect to dilutive adjustments	$ 163	$ 246
Shares
Income from continuing operations (in shares)	420	464
Share options and restricted share awards	7	7
Income from continuing operations attributable to Tyco common shareholders, giving effect to dilutive adjustments (in shares)	427	471
Per Share Amount
Income from continuing operations (in dollars per share)	$ 0.39	$ 0.53
Income from continuing operations attributable to Tyco common shareholders, giving effect to dilutive adjustments (in dollars per share)	$ 0.38	$ 0.52
Restricted stock units
Earnings Per Share
Stock options and restricted stock excluded from the computation of earnings per share	2	1
Employee stock option
Earnings Per Share
Stock options and restricted stock excluded from the computation of earnings per share	3	2

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This element represents the income or loss from continuing operations attributable to the reporting entity plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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