Revenue - Disaggregation of Net Sales by Market Geography for Each Segment (Details) - USD ($) $ in Millions	12 Months Ended
Apr. 25, 2025	Apr. 26, 2024	Apr. 28, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 33,537	$ 32,364	$ 31,227
Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	33,489	32,142	30,731
Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(90)	0	0
U.S. Pension Benefits
Disaggregation of Revenue [Line Items]
Net sales	17,171	16,562	16,373
U.S. Pension Benefits \| Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
International
Disaggregation of Revenue [Line Items]
Net sales	16,365	15,802	14,854
International \| Consolidation, Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net sales	(90)	0	0
Reportable segment net sales \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	33,489	32,142	30,731
Reportable segment net sales \| U.S. Pension Benefits \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	17,104	16,471	16,212
Reportable segment net sales \| International \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	16,386	15,671	14,519
Cardiovascular
Disaggregation of Revenue [Line Items]
Net sales	12,481	11,831	11,522
Cardiovascular \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	12,481	11,831	11,522
Cardiovascular \| U.S. Pension Benefits \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	5,804	5,597	5,796
Cardiovascular \| International \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	6,677	6,234	5,725
Neuroscience
Disaggregation of Revenue [Line Items]
Net sales	9,846	9,406	8,959
Neuroscience \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	9,846	9,406	8,959
Neuroscience \| U.S. Pension Benefits \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	6,713	6,305	6,018
Neuroscience \| International \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	3,133	3,101	2,941
Medical Surgical
Disaggregation of Revenue [Line Items]
Net sales	8,407	8,417	7,989
Medical Surgical \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	8,407	8,417	7,989
Medical Surgical \| U.S. Pension Benefits \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	3,664	3,717	3,549
Medical Surgical \| International \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	4,744	4,700	4,440
Diabetes
Disaggregation of Revenue [Line Items]
Net sales	2,755	2,488	2,262
Diabetes \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	2,755	2,488	2,262
Diabetes \| U.S. Pension Benefits \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	923	852	849
Diabetes \| International \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	1,832	1,636	1,413
Other operating segment \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	137	221	495
Other operating segment \| U.S. Pension Benefits \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	68	91	160
Other operating segment \| International \| Reportable segments
Disaggregation of Revenue [Line Items]
Net sales	$ 70	$ 131	$ 335