Revenue - Disaggregation of Net Sales by Segment and Division (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 28, 2022	Jan. 29, 2021	Jan. 28, 2022	Jan. 29, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 7,763	$ 7,775	$ 23,597	$ 21,929
Cardiovascular
Disaggregation of Revenue [Line Items]
Net sales	2,745	2,707	8,462	7,865
Cardiovascular | Cardiac Rhythm & Heart Failure
Disaggregation of Revenue [Line Items]
Net sales	1,402	1,371	4,356	4,045
Cardiovascular | Structural Heart & Aortic
Disaggregation of Revenue [Line Items]
Net sales	740	730	2,277	2,090
Cardiovascular | Coronary & Peripheral Vascular
Disaggregation of Revenue [Line Items]
Net sales	603	605	1,829	1,730
Medical Surgical
Disaggregation of Revenue [Line Items]
Net sales	2,290	2,313	6,910	6,399
Medical Surgical | Surgical Innovations
Disaggregation of Revenue [Line Items]
Net sales	1,519	1,423	4,570	3,896
Medical Surgical | Respiratory, Gastrointestinal, & Renal
Disaggregation of Revenue [Line Items]
Net sales	771	890	2,341	2,502
Neuroscience
Disaggregation of Revenue [Line Items]
Net sales	2,144	2,126	6,484	5,900
Neuroscience | Cranial & Spinal Technologies
Disaggregation of Revenue [Line Items]
Net sales	1,102	1,081	3,292	3,096
Neuroscience | Specialty Therapies
Disaggregation of Revenue [Line Items]
Net sales	633	618	1,908	1,653
Neuroscience | Neuromodulation
Disaggregation of Revenue [Line Items]
Net sales	409	426	1,285	1,152
Diabetes
Disaggregation of Revenue [Line Items]
Net sales	$ 584	$ 630	$ 1,741	$ 1,766