Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Contribution Margin
Total Contribution Margin		$ 537.5	$ 594.9
Selling, general and administrative expenses	[1]	475.9	454.9
Other operating income		(8.9)	(13.1)
Interest expense, net		39.4	29.7
Income before income taxes		31.1	123.4
Income taxes		1.8	25.2
Net income		29.3	98.2
Primary Reporting Segment [Member]
Contribution Margin
Total Contribution Margin		482.5	504.4
China [Member]
Contribution Margin
Total Contribution Margin		55.0	90.5
Other operating income		$ (8.9)	$ (13.1)

[1] Contribution margin consists of net sales less cost of sales and Royalty overrides. For the China segment, contribution margin does not include the portion of service fees to China independent service providers included in selling, general, and administrative expenses, which totaled $33.7 million and $54.2 million for the three months ended March 31, 2023 and 2022, respectively.