Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
Mar. 29, 2013
Basis of Presentation and Summary of Significant Accounting Policies
Basis of Presentation	Basis of Presentation—The Consolidated Financial Statements included herein are unaudited, but in the opinion of management, such financial statements include all adjustments, consisting of normal recurring adjustments, necessary to summarize fairly the Company's financial position, results of operations and cash flows for the interim period. The unaudited Consolidated Financial Statements include the consolidated results of Tyco International Ltd., a corporation organized under the laws of Switzerland, and its subsidiaries (Tyco and all its subsidiaries, hereinafter collectively referred to as the "Company" or "Tyco"). The unaudited Consolidated Financial Statements have been prepared in United States dollars ("USD") and in accordance with the instructions to Form 10-Q under the Securities Exchange Act of 1934, as amended. The results reported in these unaudited Consolidated Financial Statements should not be taken as indicative of results that may be expected for the entire year. These financial statements should be read in conjunction with the Consolidated Financial Statements and accompanying notes contained in the Company's Annual Report on Form 10-K for the fiscal year ended September 28, 2012 (the "2012 Form 10-K"). Effective September 28, 2012, Tyco completed the spin-offs of The ADT Corporation ("ADT") and Pentair Ltd. (formerly known as Tyco Flow Control International Ltd. ("Tyco Flow Control")), formerly the North American residential security and flow control businesses of Tyco, respectively, into separate, publicly traded companies in the form of a distribution to Tyco shareholders. Immediately following the spin-off, Pentair, Inc. was merged with a subsidiary of Tyco Flow Control in a tax-free, all-stock merger (the "Merger"), with Pentair Ltd. ("Pentair") succeeding Pentair Inc. as an independent publicly traded company. The distribution was made on September 28, 2012, to Tyco shareholders of record on September 17, 2012. Each Tyco shareholder received 0.50 of a common share of ADT and approximately 0.24 of a common share of Pentair for each Tyco common share held on the record date. The distribution was structured to be tax-free to Tyco shareholders except to the extent of cash received in lieu of fractional shares. The distributions, the Merger and related transactions are collectively referred to herein as the "2012 Separation". As a result of the distribution, the operations of Tyco's former flow control and North American residential security businesses are now classified as discontinued operations in all periods presented. After giving effect to the 2012 Separation, the Company operates and reports financial and operating information in the following three segments: North America Systems Installation & Services ("NA Installation & Services"), Rest of World Systems Installation & Services ("ROW Installation & Services") and Global Products. The Company also provides general corporate services to its segments which is reported as a fourth non-operating segment, Corporate and Other, and accordingly, prior period segment amounts have been recast to conform to the current period presentation. See Note 15. References to 2013 and 2012 are to Tyco's fiscal quarters ending March 29, 2013 and March 30, 2012, respectively, unless otherwise indicated. The Company has a 52 or 53-week fiscal year that ends on the last Friday in September. Fiscal years 2013 and 2012 are both 52-week years.

Basis of Presentation—The Consolidated Financial Statements included herein are unaudited, but in the opinion of management, such financial statements include all adjustments, consisting of normal recurring adjustments, necessary to summarize fairly the Company's financial position, results of operations and cash flows for the interim period. The unaudited Consolidated Financial Statements include the consolidated results of Tyco International Ltd., a corporation organized under the laws of Switzerland, and its subsidiaries (Tyco and all its subsidiaries, hereinafter collectively referred to as the "Company" or "Tyco"). The unaudited Consolidated Financial Statements have been prepared in United States dollars ("USD") and in accordance with the instructions to Form 10-Q under the Securities Exchange Act of 1934, as amended. The results reported in these unaudited Consolidated Financial Statements should not be taken as indicative of results that may be expected for the entire year. These financial statements should be read in conjunction with the Consolidated Financial Statements and accompanying notes contained in the Company's Annual Report on Form 10-K for the fiscal year ended September 28, 2012 (the "2012 Form 10-K").

Effective September 28, 2012, Tyco completed the spin-offs of The ADT Corporation ("ADT") and Pentair Ltd. (formerly known as Tyco Flow Control International Ltd. ("Tyco Flow Control")), formerly the North American residential security and flow control businesses of Tyco, respectively, into separate, publicly traded companies in the form of a distribution to Tyco shareholders. Immediately following the spin-off, Pentair, Inc. was merged with a subsidiary of Tyco Flow Control in a tax-free, all-stock merger (the "Merger"), with Pentair Ltd. ("Pentair") succeeding Pentair Inc. as an independent publicly traded company. The distribution was made on September 28, 2012, to Tyco shareholders of record on September 17, 2012. Each Tyco shareholder received 0.50 of a common share of ADT and approximately 0.24 of a common share of Pentair for each Tyco common share held on the record date. The distribution was structured to be tax-free to Tyco shareholders except to the extent of cash received in lieu of fractional shares. The distributions, the Merger and related transactions are collectively referred to herein as the "2012 Separation". As a result of the distribution, the operations of Tyco's former flow control and North American residential security businesses are now classified as discontinued operations in all periods presented.

After giving effect to the 2012 Separation, the Company operates and reports financial and operating information in the following three segments: North America Systems Installation & Services ("NA Installation & Services"), Rest of World Systems Installation & Services ("ROW Installation & Services") and Global Products. The Company also provides general corporate services to its segments which is reported as a fourth non-operating segment, Corporate and Other, and accordingly, prior period segment amounts have been recast to conform to the current period presentation. See Note 15.

References to 2013 and 2012 are to Tyco's fiscal quarters ending March 29, 2013 and March 30, 2012, respectively, unless otherwise indicated.

The Company has a 52 or 53-week fiscal year that ends on the last Friday in September. Fiscal years 2013 and 2012 are both 52-week years.