Revenue - Revenue by Geography (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Net sales	$ 5,065	$ 4,209	$ 14,788	$ 12,186
U.S.
Disaggregation of Revenue [Line Items]
Net sales	3,294	2,593	9,479	7,317
U.S. | BSX Reportable Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	3,294	2,593	9,479	7,317
EMEA [Member] | BSX Reportable Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	793	773	2,518	2,398
APAC [Member] | BSX Reportable Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	802	684	2,292	2,002
Latin America and Canada [Member] | BSX Reportable Segments [Member]
Disaggregation of Revenue [Line Items]
Net sales	175	159	499	469
Emerging Markets [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 765	$ 684	$ 2,214	$ 2,012