Guarantees	6 Months Ended
Mar. 25, 2016
Guarantees
Guarantees	10. Guarantees Tax Sharing Agreement Effective June 29, 2007, we became the parent company of the former electronics businesses of Tyco International plc ("Tyco International"). On June 29, 2007, Tyco International distributed all of our shares, as well as its shares of its former healthcare businesses ("Covidien"), to its common shareholders (the "separation"). Covidien was subsequently acquired and currently operates as a subsidiary of Medtronic plc. Upon separation, we entered into a Tax Sharing Agreement, under which we share responsibility for certain of our, Tyco International's, and Covidien's income tax liabilities based on a sharing formula for periods prior to and including June 29, 2007. We, Tyco International, and Covidien share 31%, 27%, and 42%, respectively, of U.S. income tax liabilities that arise from adjustments made by tax authorities to our, Tyco International's, and Covidien's U.S. income tax returns. The effect of the Tax Sharing Agreement is to indemnify us for 69% of certain liabilities settled in cash by us with respect to unresolved pre-separation tax matters. Pursuant to that indemnification, we have made similar indemnifications to Tyco International and Covidien with respect to 31% of certain liabilities settled in cash by the companies relating to unresolved pre-separation tax matters. If any of the companies responsible for all or a portion of such liabilities were to default in its payment of costs or expenses related to any such liability, we would be responsible for a portion of the defaulting party or parties' obligation. Our indemnification created under the Tax Sharing Agreement qualifies as a guarantee of a third party entity's debt under ASC 460, Guarantees. See Note 11 for additional information regarding pre-separation tax matters. Other Matters In disposing of assets or businesses, we often provide representations, warranties, and/or indemnities to cover various risks including unknown damage to assets, environmental risks involved in the sale of real estate, liability for investigation and remediation of environmental contamination at waste disposal sites and manufacturing facilities, and unidentified tax liabilities and legal fees related to periods prior to disposition. We do not expect that these uncertainties will have a material adverse effect on our results of operations, financial position, or cash flows. At March 25, 2016, we had outstanding letters of credit, letters of guarantee, and surety and appeal bonds of $506 million. In the normal course of business, we are liable for contract completion and product performance. In the opinion of management, such obligations will not significantly affect our results of operations, financial position, or cash flows. We generally record estimated product warranty costs when contract revenues are recognized under the percentage-of-completion method for construction related contracts; other warranty reserves are not significant. The estimation is based primarily on historical experience and actual warranty claims. Amounts accrued for warranty claims were $41 million and $35 million at March 25, 2016 and September 25, 2015, respectively.

10. Guarantees

Tax Sharing Agreement

Effective June 29, 2007, we became the parent company of the former electronics businesses of Tyco International plc ("Tyco International"). On June 29, 2007, Tyco International distributed all of our shares, as well as its shares of its former healthcare businesses ("Covidien"), to its common shareholders (the "separation"). Covidien was subsequently acquired and currently operates as a subsidiary of Medtronic plc.

Upon separation, we entered into a Tax Sharing Agreement, under which we share responsibility for certain of our, Tyco International's, and Covidien's income tax liabilities based on a sharing formula for periods prior to and including June 29, 2007. We, Tyco International, and Covidien share 31%, 27%, and 42%, respectively, of U.S. income tax liabilities that arise from adjustments made by tax authorities to our, Tyco International's, and Covidien's U.S. income tax returns. The effect of the Tax Sharing Agreement is to indemnify us for 69% of certain liabilities settled in cash by us with respect to unresolved pre-separation tax matters. Pursuant to that indemnification, we have made similar indemnifications to Tyco International and Covidien with respect to 31% of certain liabilities settled in cash by the companies relating to unresolved pre-separation tax matters. If any of the companies responsible for all or a portion of such liabilities were to default in its payment of costs or expenses related to any such liability, we would be responsible for a portion of the defaulting party or parties' obligation. Our indemnification created under the Tax Sharing Agreement qualifies as a guarantee of a third party entity's debt under ASC 460, Guarantees. See Note 11 for additional information regarding pre-separation tax matters.

Other Matters

In disposing of assets or businesses, we often provide representations, warranties, and/or indemnities to cover various risks including unknown damage to assets, environmental risks involved in the sale of real estate, liability for investigation and remediation of environmental contamination at waste disposal sites and manufacturing facilities, and unidentified tax liabilities and legal fees related to periods prior to disposition. We do not expect that these uncertainties will have a material adverse effect on our results of operations, financial position, or cash flows.

At March 25, 2016, we had outstanding letters of credit, letters of guarantee, and surety and appeal bonds of $506 million.

In the normal course of business, we are liable for contract completion and product performance. In the opinion of management, such obligations will not significantly affect our results of operations, financial position, or cash flows.

We generally record estimated product warranty costs when contract revenues are recognized under the percentage-of-completion method for construction related contracts; other warranty reserves are not significant. The estimation is based primarily on historical experience and actual warranty claims. Amounts accrued for warranty claims were $41 million and $35 million at March 25, 2016 and September 25, 2015, respectively.