Stock Transactions And Stock-Based Compensation - Summary of Share Activity (Details) - shares shares in Millions		12 Months Ended
	Sep. 20, 2019	Dec. 31, 2020	Dec. 31, 2019
Stock Activity [Roll Forward]
Shares issued to Danaher	127.9
Common Stock
Stock Activity [Roll Forward]
Balance, beginning of period		158.7	0.0
Shares issued to Danaher		0.0	127.9
Issuance of common stock		1.5	30.8
Balance, end of period		160.2	158.7