CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Jan. 01, 2021	Jan. 03, 2020
Revenues:
Revenues	$ 778.8	$ 828.9
Cost of revenues:
Total cost of revenues	419.8	462.1
Gross margin	359.0	366.8
Operating expenses:
Research and development	72.2	67.1
Selling, general and administrative	161.9	177.0
Acquisition-related expenses	7.7	12.7
Total operating expenses	241.8	256.8
Operating earnings	117.2	110.0
Interest income	2.8	3.0
Interest expense	(1.3)	(4.7)
Other income, net	5.7	4.4
Earnings before taxes	124.4	112.7
Taxes on earnings	27.6	23.8
Net earnings	96.8	88.9
Less: Net earnings attributable to noncontrolling interests	0.3	0.7
Net earnings attributable to Varian	$ 96.5	$ 88.2
Earnings Per Share [Abstract]
Net earnings per share - basic (in dollars per share)	$ 1.06	$ 0.97
Net earnings per share - diluted (in dollars per share)	$ 1.05	$ 0.96
Shares used in the calculation of net earnings per share:
Weighted average shares outstanding - basic (in shares)	91.4	90.9
Weighted average shares outstanding - diluted (in shares)	92.2	91.7
Product
Revenues:
Revenues	$ 364.2	$ 421.0
Cost of revenues:
Total cost of revenues	245.1	271.9
Service
Revenues:
Revenues	414.6	407.9
Cost of revenues:
Total cost of revenues	$ 174.7	$ 190.2