Net Income per Share - Additional Information (Detail) - shares shares in Millions	Oct. 01, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Class Of Stock [Line Items]
Common stock, shares issued (in shares)	64.2	64.3	64.2	29.1
Common stock, shares outstanding (in shares)	64.2	64.3	64.2	29.1
Fortive [Member] | Common Stock [Member]
Class Of Stock [Line Items]
Stock issued	35.0