Retirement Benefit Plans, Funding and Effect of 1% Change in Assumed Health Care Cost Trend Rates (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Apr. 26, 2013
Estimated Medicare Part D Receipts
2014	$ 0
2015	0
2016	0
2017	0
2018	0
2019 - 2023	0
Total	0
Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates
Effect on post-retirement benefit cost, 1% point increase	2
Effect on post-retirement benefit cost, 1% point decrease	(1)
Effect on post-retirement benefit obligation, 1% point increase	13
Effect on post-retirement benefit obligation, 1% point decrease	(10)
U.S. Pension Benefits
Estimated Future Benefit Payments
2014	51
2015	59
2016	68
2017	77
2018	87
2019 - 2023	597
Total	939
Non-U.S. Pension Benefits
Estimated Future Benefit Payments
2014	25
2015	26
2016	27
2017	28
2018	30
2019 - 2023	161
Total	297
Post-Retirement Benefits
Estimated Future Benefit Payments
2014	10
2015	11
2016	12
2017	14
2018	16
2019 - 2023	107
Total	$ 170