Carrying Amount of Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($)
Goodwill [Line Items]
Beginning balance	$ 2,229.6
Ending balance	2,229.8
Zicam Acquisition
Goodwill [Line Items]
Zicam adjustment	0.2
Consumer Domestic
Goodwill [Line Items]
Beginning balance	1,859.3
Ending balance	1,859.5
Consumer Domestic | Zicam Acquisition
Goodwill [Line Items]
Zicam adjustment	0.2
Consumer International
Goodwill [Line Items]
Beginning balance	234.3
Ending balance	234.3
Consumer International | Zicam Acquisition
Goodwill [Line Items]
Zicam adjustment	0.0
Specialty Products
Goodwill [Line Items]
Beginning balance	136.0
Ending balance	136.0
Specialty Products | Zicam Acquisition
Goodwill [Line Items]
Zicam adjustment	$ 0.0