Stock Transactions And Stock-Based Compensation Summary of Share Activity (Details) - shares shares in Millions		3 Months Ended		9 Months Ended
	Sep. 20, 2019	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Issued to Danaher	127.9
Issuance of common stock	30.8
Common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period		0.0	0.0	0.0	0.0
Shares Issued to Danaher		127.9	0.0	127.9	0.0
Issuance of common stock		30.8	0.0	30.8	0.0
Balance, end of period		158.7	0.0	158.7	0.0