Summary of Significant Accounting Policies (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Apr. 26, 2013	Jan. 25, 2013	Oct. 26, 2012	Jul. 27, 2012	Apr. 27, 2012	Jan. 27, 2012	Oct. 28, 2011	Jul. 29, 2011	Apr. 26, 2013		Apr. 27, 2012		Apr. 29, 2011		Apr. 30, 2010
Shipping, Handling and Transportation Costs									$ 153		$ 146		$ 136
Inventories
Finished goods	1,174				1,175				1,174		1,175
Work in process	248				288				248		288
Raw materials	290				337				290		337
Total	1,712				1,800				1,712		1,800
Property, Plant and Equipment
Property, plant, and equipment, gross	6,152				5,796				6,152		5,796
Less: Accumulated depreciation	(3,662)				(3,323)				(3,662)		(3,323)
Property, plant, and equipment, net	2,490				2,473				2,490		2,473		2,488
Depreciation expense									488		498		464
Changes in Product Warranty Obligations
Balance as of beginning of period				31				35	31		35
Warranty claims provision									25		23
Settlements made									(21)		(27)
Balance as of end of peridod	35				31				35		31		35
AOCI
Unrealized Gain/(Loss) on Investments	97				130				97		130		196		(30)
Cumulative Translation Adjustments	285				306				285		306		443		243
Net Change in Retirement Obligations	(852)				(834)				(852)		(834)		(607)		(612)
Unrealized Gain/(Loss) on Derivatives	(22)				(75)				(22)		(75)		(256)		92
Accumulated Other Comprehensive Loss	(492)				(473)				(492)		(473)		(224)		(307)
OCI
Unrealized Gain/(Loss) on Investments									(33)		(66)		226
Cumulative Translation Adjustments									(21)		(137)		200
Net Change in Retirement Obligations									(18)		(227)		5
Unrealized Gain/(Loss) on Derivatives									53		181		(348)
Other comprehensive income (loss)									(19)		(249)		83
Earnings Per Share Reconciliation
Earnings from continuing operations	969	988	646	864	888	845	864	819	3,467		3,415		3,055
Earnings from discontinued operations									0		202		41
Net earnings	969	988	646	864	991	935	871	821	3,467		3,617		3,096
Basic weighted average shares outstanding									1,019.3		1,053.9		1,077.4
Effect of dilutive securities:
Employee stock options									2.8		0.9		0.6
Employee resticted stock units									5.3		4.9		3.4
Other									0.1		0.2		0.3
Diluted weighted average shares outstanding									1,027.5		1,059.9		1,081.7
Basic earnings per share:
Earnings from continuing operations (per share)	$ 0.96	$ 0.98	$ 0.63	$ 0.84	$ 0.85	$ 0.80	$ 0.82	$ 0.77	$ 3.40		$ 3.24		$ 2.84
Earnings from discontinued operations (per share)									$ 0.00		$ 0.19		$ 0.04
Net earnings (per share)	$ 0.96	$ 0.98	$ 0.63	$ 0.84	$ 0.95	$ 0.89	$ 0.82	$ 0.77	$ 3.40	[1]	$ 3.43	[1]	$ 2.87	[1]
Diluted earnings per share:
Earnings from continuing operations (per share)	$ 0.95	$ 0.97	$ 0.63	$ 0.83	$ 0.85	$ 0.80	$ 0.81	$ 0.77	$ 3.37		$ 3.22		$ 2.82
Earnings from discontinued operations (per share)									$ 0.00		$ 0.19		$ 0.04
Net earnings (per share)	$ 0.95	$ 0.97	$ 0.63	$ 0.83	$ 0.94	$ 0.88	$ 0.82	$ 0.77	$ 3.37		$ 3.41		$ 2.86
Senior convertible notes	910				3,274				910		3,274
Stock Options
Diluted earnings per share:
Number of shares excluded from computation of earnings per share									38		51		59
Minimum
Intangible Assets
Intangible assets, estimated useful life									3 years
Maximum
Intangible Assets
Intangible assets, estimated useful life									20 years
Land and land improvements
Property, Plant and Equipment
Property, plant, and equipment, gross	151				135				151		135
Land and land improvements | Maximum
Property, Plant and Equipment
Property, plant and equipment, estimate useful life (in years)									20 years
Buildings and leasehold improvements
Property, Plant and Equipment
Property, plant, and equipment, gross	1,532				1,475				1,532		1,475
Buildings and leasehold improvements | Maximum
Property, Plant and Equipment
Property, plant and equipment, estimate useful life (in years)									40 years
Equipment
Property, Plant and Equipment
Property, plant, and equipment, gross	4,110				3,858				4,110		3,858
Equipment | Minimum
Property, Plant and Equipment
Property, plant and equipment, estimate useful life (in years)									3 years
Equipment | Maximum
Property, Plant and Equipment
Property, plant and equipment, estimate useful life (in years)									7 years
Construction in progress
Property, Plant and Equipment
Property, plant, and equipment, gross	359				328				359		328
Senior Convertible Notes
Diluted earnings per share:
Senior convertible notes	$ 2,200				$ 2,200				$ 2,200		$ 2,200		$ 2,200

[1] All earnings per share amounts have been rounded to the nearest $0.01, and therefore, may not sum.