Retirement Plans (Schedule of Actuarial Assumptions) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012
Effect of One-Percentage Point Change in Assumed Healthcare Cost Trend Rates
One-Percentage-Point Increase, effect on total of service and interest cost	$ 0
One-Percentage-Point Decrease, effect on total of service and interest cost	0
One-Percentage-Point Increase, effect on postretirement benefit obligation	0.4
One-Percentage-Point Decrease, effect on postretirement obligation	$ (0.3)
U.S. Plans
Weighted Average-Assumptions Used in Calculating Net Periodic Benefit Cost
Discount rate	4.20%	3.50%	4.40%
Expected return on plan assets	6.50%	7.90%	7.50%
Rate of compensation increase	0.00%	0.00%	2.80%
Weighted-Average Assumptions Used in Calculating Benefit Obligations
Discount rate	3.90%	4.30%	3.50%
Rate of compensation increase	0.00%	0.00%	0.00%
Non-U.S. Plans
Weighted Average-Assumptions Used in Calculating Net Periodic Benefit Cost
Discount rate	3.50%	4.00%	5.20%
Expected return on plan assets	3.10%	3.50%	4.00%
Rate of compensation increase	3.50%	3.70%	3.70%
Weighted-Average Assumptions Used in Calculating Benefit Obligations
Discount rate	2.50%	3.70%	4.00%
Rate of compensation increase	3.40%	3.50%	3.70%
Postretirement Benefits
Weighted Average-Assumptions Used in Calculating Net Periodic Benefit Cost
Discount rate	4.00%	3.20%	4.10%
Weighted-Average Assumptions Used in Calculating Benefit Obligations
Discount rate	3.70%	4.00%	3.20%
Healthcare Cost Trend Assumptions
Healthcare cost trend rate assumed for next fiscal year	7.10%	7.30%
Rate to which the cost trend rate is assumed to decline	4.50%	4.50%
Fiscal year the ultimate trend rate is achieved	2029	2029

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The interest rate used to adjust for the time value of money for the plan.

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- Definition

Expected rate of compensation increases (for pay-related plans).

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The interest rate used to adjust for the time value of money.

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Long-Term Rate of Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512013

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(3)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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Expected rate of compensation increases (for pay-related plans).

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Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

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- Definition

The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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The effect of a one-percentage-point increase in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

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- Definition

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (l)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Health Care Cost Trend Rate

-URI http://asc.fasb.org/extlink&oid=6514820

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The ultimate trend rate for health care costs.

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Year the ultimate health care cost trend rate is expected to be reached, in CCYY format.

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