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Revenue - Business Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 4,100.5	$ 4,030.3	$ 4,030.4
United States
Disaggregation of Revenue [Line Items]
Revenues	3,047.9	3,024.1	3,058.0
International
Disaggregation of Revenue [Line Items]
Revenues	1,052.6	1,006.2	972.4
Diagnostics
Disaggregation of Revenue [Line Items]
Revenues	1,827.2	1,782.0	1,880.1
Diagnostics | United States
Disaggregation of Revenue [Line Items]
Revenues	1,352.7	1,312.7	1,396.2
Diagnostics | International
Disaggregation of Revenue [Line Items]
Revenues	474.5	469.3	483.9
Diagnostics | Cytology & Perinatal
Disaggregation of Revenue [Line Items]
Revenues	488.6	479.2	480.6
Diagnostics | Cytology & Perinatal | United States
Disaggregation of Revenue [Line Items]
Revenues	296.1	283.3	297.4
Diagnostics | Cytology & Perinatal | International
Disaggregation of Revenue [Line Items]
Revenues	192.5	195.9	183.2
Diagnostics | Molecular Diagnostics
Disaggregation of Revenue [Line Items]
Revenues	1,310.4	1,272.5	1,361.7
Diagnostics | Molecular Diagnostics | United States
Disaggregation of Revenue [Line Items]
Revenues	1,028.4	999.1	1,061.0
Diagnostics | Molecular Diagnostics | International
Disaggregation of Revenue [Line Items]
Revenues	282.0	273.4	300.7
Diagnostics | Blood Screening
Disaggregation of Revenue [Line Items]
Revenues	28.2	30.3	37.8
Diagnostics | Blood Screening | United States
Disaggregation of Revenue [Line Items]
Revenues	28.2	30.3	37.8
Diagnostics | Blood Screening | International
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0	0.0
Breast Health
Disaggregation of Revenue [Line Items]
Revenues	1,484.1	1,522.9	1,432.7
Breast Health | United States
Disaggregation of Revenue [Line Items]
Revenues	1,142.3	1,177.5	1,116.6
Breast Health | International
Disaggregation of Revenue [Line Items]
Revenues	341.8	345.4	316.1
Breast Health | Breast Imaging
Disaggregation of Revenue [Line Items]
Revenues	1,109.5	1,210.7	1,144.2
Breast Health | Breast Imaging | United States
Disaggregation of Revenue [Line Items]
Revenues	860.2	932.9	884.0
Breast Health | Breast Imaging | International
Disaggregation of Revenue [Line Items]
Revenues	249.3	277.8	260.2
Breast Health | Interventional Breast Solutions
Disaggregation of Revenue [Line Items]
Revenues	374.6	312.2	288.5
Breast Health | Interventional Breast Solutions | United States
Disaggregation of Revenue [Line Items]
Revenues	282.1	244.6	232.6
Breast Health | Interventional Breast Solutions | International
Disaggregation of Revenue [Line Items]
Revenues	92.5	67.6	55.9
GYN Surgical
Disaggregation of Revenue [Line Items]
Revenues	679.8	641.3	604.2
GYN Surgical | United States
Disaggregation of Revenue [Line Items]
Revenues	490.4	482.5	475.3
GYN Surgical | International
Disaggregation of Revenue [Line Items]
Revenues	189.4	158.8	128.9
Skeletal Health
Disaggregation of Revenue [Line Items]
Revenues	109.4	84.1	113.4
Skeletal Health | United States
Disaggregation of Revenue [Line Items]
Revenues	62.5	51.4	69.9
Skeletal Health | International
Disaggregation of Revenue [Line Items]
Revenues	$ 46.9	$ 32.7	$ 43.5

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