Pension and Other Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Prescription Drug Subsidy Receipts Current Fiscal Year			$ 1
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Pension Plans Contributions By Employer	61		117
Defined Benefit Pension Plans Estimated Total Employer Contributions Current Fiscal Year	252		252
Pension Plans, Defined Benefit [Member] | US pension plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Additional contractual termination benefits for a certain U.K. pension plan	0	0	0	0
Components of net periodic benefit cost [Abstract]
Service cost	2	2	5	4
Interest cost	38	41	78	82
Expected return on assets	(36)	(36)	(76)	(72)
Amortization of unrecognized net loss	10	8	21	17
Contractual termination benefit	0	0	0	0
Net periodic pension cost	14	15	28	31
Pension Plans, Defined Benefit [Member] | Non-US pension plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease)	(28)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.00%		4.00%
Additional contractual termination benefits for a certain U.K. pension plan	1	0	6	0
Components of net periodic benefit cost [Abstract]
Service cost	6	7	14	14
Interest cost	29	32	60	64
Expected return on assets	(30)	(32)	(61)	(64)
Amortization of unrecognized net loss	5	4	10	8
Contractual termination benefit	1	0	6	0
Net periodic pension cost	11	11	29	22
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated Employer Contributions in Current Fiscal Year	10		10
Contributions by Employer	3		4
Components of net periodic benefit cost [Abstract]
Service cost	1	1	2	2
Interest cost	3	3	6	6
Expected return on assets	(1)	(2)	(3)	(4)
Amortization of unrecognized net loss	3	2	7	4
Net periodic pension cost	$ 6	$ 4	$ 12	$ 8