Employee Benefit Plans (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Employee Benefit Plans [Line Items]
Percentage match of eligible compensation contributed to investment selection	25.00%
Percentage of eligible compensation contributed to investment selection for which matching contribution is made	2.00%
Total accumulated benefit obligation	$ 766,870	$ 832,303
Fair values of plan assets total	597,543
Number of plans	2	3
Fair value of plan assets exceeding accumulated benefit obligations	549,696	487,673
Transition obligation expense period, years	20
Defined benefit plan, ultimate trend rate	4.50%
Defined benefit plan, year of ultimate trend rate	2028
Increase in accumulated postretirement benefit obligation due to one percentage point increase in this rate	520
Decrease in accumulated postretirement benefit obligation due to one percentage point decrease in this rate	483
Profit share expense	14,950	25,100	30,025
U.S. Pension Plans [Member]
Employee Benefit Plans [Line Items]
Defined Benefit Plan, Contributions by Employer	44,000
Fair values of plan assets total	498,918	441,426
Individual pension plan as a percentage of consolidate pension plan	84.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	8.60%	8.90%	8.90%
Percentage of assumed average rate of return in equity securities	60.00%
Percentage of assumed average rate of return in fixed income securities	30.00%
Percentage of assumed average rate of return in other securities	10.00%
Assumptions for benefit obligations, Discount rate	5.00%	3.70%	4.70%
Assumptions for net periodic benefit cost, Discount rate	3.70%	4.70%	5.20%
Three Plan Member [Member]
Employee Benefit Plans [Line Items]
Fair value of plan assets exceeding accumulated benefit obligations	47,847	37,798
Accumulated benefit obligation of plans with fair value exceeding accumulated benefit obligation	40,984	33,438
Non-U.S. Pension Plans [Member]
Employee Benefit Plans [Line Items]
Defined Benefit Plan, Contributions by Employer	7,300
Fair values of plan assets total	98,625	84,044
Individual pension plan as a percentage of consolidate pension plan	16.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	4.50%	5.50%	5.10%
Percentage of assumed average rate of return in equity securities	40.00%
Percentage of assumed average rate of return in fixed income securities	60.00%
Assumptions for benefit obligations, Discount rate	3.60%	3.90%	4.70%
Assumptions for net periodic benefit cost, Discount rate	4.00%	4.70%	4.60%
U.K. Pension Plans [Member]
Employee Benefit Plans [Line Items]
Individual pension plan as a percentage of consolidate pension plan	6.00%
Medical And Drug Costs Before Age 65 [Member]
Employee Benefit Plans [Line Items]
Annual per capita rate of increase of medical and drug costs	7.40%
Medical Costs After Age 65 [Member]
Employee Benefit Plans [Line Items]
Annual per capita rate of increase of medical and drug costs	6.80%
Drug Costs After Age 65 [Member]
Employee Benefit Plans [Line Items]
Annual per capita rate of increase of medical and drug costs	7.80%
Class A Common Stock [Member]
Employee Benefit Plans [Line Items]
Number of shares owned by the participants under RSP	600,840
Class A Common Stock [Member] | U.S. Pension Plans [Member]
Employee Benefit Plans [Line Items]
Number of stock included in plan assets	149,022
Class B Common Stock [Member]
Employee Benefit Plans [Line Items]
Number of shares owned by the participants under RSP	1,781,712
Class B Common Stock [Member] | U.S. Pension Plans [Member]
Employee Benefit Plans [Line Items]
Number of stock included in plan assets	1,001,034
Postretirement Benefit Plan [Member]
Employee Benefit Plans [Line Items]
Assumptions for benefit obligations, Discount rate	4.50%	3.30%	4.50%
Assumptions for net periodic benefit cost, Discount rate	3.30%	4.50%	4.80%
Defined Benefit Pension [Member]
Employee Benefit Plans [Line Items]
Estimated net actuarial loss that will be amortized	17,734
Estimated net prior service cost that will be amortized	$ 101