Other Comprehensive Income/(Loss) (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 28, 2013	Apr. 29, 2012	Apr. 27, 2011
Comprehensive Income (Loss) [Line Items]
Net income	$ 1,027,333	$ 939,908	$ 1,005,948
Foreign currency translation adjustments	(228,980)	(377,491)	567,876
Net pension and post-retirement benefit (losses)/gains	(189,302)	(258,079)	77,298
Reclassification of net pension and post-retirement benefit losses to net income	54,833	56,813	53,353
Net deferred gains/(losses) on derivatives from periodic revaluations	(11,743)	30,377	9,395
Net deferred losses/(gains) on derivatives reclassified to earnings	29,608	(13,811)	(20,794)
Total comprehensive income/(loss)	681,749	377,717	1,693,076
Tax expenses benefits associated with components of other comprehensive income
Foreign currency translation adjustments	(115)	180	(1,158)
Net pension and post-retirement benefit gains/(losses)	(75,526)	112,674	(25,656)
Reclassification of net pension and post-retirement benefit losses to net income	23,694	25,070	25,276
Net change in fair value of cash flow hedges	17,714	(17,761)	(10,216)
Net hedging gains/losses reclassified into earnings	25,941	(10,664)	(14,958)
Parent [Member]
Comprehensive Income (Loss) [Line Items]
Net income	1,012,903	923,159	989,510
Foreign currency translation adjustments	(213,259)	(359,771)	563,060
Net pension and post-retirement benefit (losses)/gains	(189,294)	(258,067)	77,355
Reclassification of net pension and post-retirement benefit losses to net income	54,833	56,813	53,353
Net deferred gains/(losses) on derivatives from periodic revaluations	(11,736)	30,405	9,790
Net deferred losses/(gains) on derivatives reclassified to earnings	29,646	(14,088)	(21,365)
Total comprehensive income/(loss)	683,093	378,451	1,671,703
Tax expenses benefits associated with components of other comprehensive income
Foreign currency translation adjustments	(115)	180	(1,158)
Net pension and post-retirement benefit gains/(losses)	(75,526)	112,665	(25,670)
Reclassification of net pension and post-retirement benefit losses to net income	23,694	25,070	25,276
Net change in fair value of cash flow hedges	17,712	(17,770)	(10,348)
Net hedging gains/losses reclassified into earnings	25,954	(10,756)	(15,149)
Noncontrolling interest including redeemable noncontrolling interest [Member]
Comprehensive Income (Loss) [Line Items]
Net income	14,430	16,749	16,438
Foreign currency translation adjustments	(15,721)	(17,720)	4,816
Net pension and post-retirement benefit (losses)/gains	(8)	(12)	(57)
Reclassification of net pension and post-retirement benefit losses to net income	0	0	0
Net deferred gains/(losses) on derivatives from periodic revaluations	(7)	(28)	(395)
Net deferred losses/(gains) on derivatives reclassified to earnings	(38)	277	571
Total comprehensive income/(loss)	(1,344)	(734)	21,373
NONCONTROLLING INTEREST
Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments	(5,232)	(5,945)	4,816
Net pension and post-retirement benefit (losses)/gains	(8)	(12)	(57)
Net deferred gains/(losses) on derivatives from periodic revaluations	(7)	(28)	(395)
Net deferred losses/(gains) on derivatives reclassified to earnings	(38)	277	571
Tax expenses benefits associated with components of other comprehensive income
Foreign currency translation adjustments	0	0	0
Net pension and post-retirement benefit gains/(losses)	0	9	14
Reclassification of net pension and post-retirement benefit losses to net income	0	0	0
Net change in fair value of cash flow hedges	2	9	132
Net hedging gains/losses reclassified into earnings	$ (13)	$ 92	$ 191