| Reconciliation of Revenue from Segments to Consolidated | Operating information for the two reportable segments is as follows:   
|   |   | Three Months Ended |   |   | Nine Months Ended |   |  
|   |   | September 30, 2020 |   |   | September 30, 2019 |   |   | September 30, 2020 |   |   | September 30, 2019 |   |  
|   |   | (in millions) |   |  
| Net sales: |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Primary Reporting Segment |   | $ | 1,301.8 |   |   | $ | 1,035.8 |   |   | $ | 3,511.7 |   |   | $ | 3,110.7 |   |  
| China |   |   | 220.0 |   |   |   | 208.7 |   |   |   | 619.4 |   |   |   | 546.1 |   |  
| Total net sales |   | $ | 1,521.8 |   |   | $ | 1,244.5 |   |   | $ | 4,131.1 |   |   | $ | 3,656.8 |   |  
| Contribution margin(1): |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Primary Reporting Segment |   | $ | 538.2 |   |   | $ | 446.7 |   |   | $ | 1,485.4 |   |   | $ | 1,346.2 |   |  
| China(2) |   |   | 197.8 |   |   |   | 190.6 |   |   |   | 553.3 |   |   |   | 492.3 |   |  
| Total contribution margin |   | $ | 736.0 |   |   | $ | 637.3 |   |   | $ | 2,038.7 |   |   | $ | 1,838.5 |   |  
| Selling, general, and administrative expenses(2) |   |   | 529.7 |   |   |   | 500.1 |   |   |   | 1,559.5 |   |   |   | 1,412.5 |   |  
| Other operating income |   |   | (0.6 | ) |   |   | (6.4 | ) |   |   | (13.0 | ) |   |   | (33.7 | ) |  
| Interest expense, net |   |   | 35.2 |   |   |   | 31.6 |   |   |   | 89.0 |   |   |   | 104.0 |   |  
| Other income, net |   |   | — |   |   |   | (1.3 | ) |   |   | — |   |   |   | (15.7 | ) |  
| Income before income taxes |   |   | 171.7 |   |   |   | 113.3 |   |   |   | 403.2 |   |   |   | 371.4 |   |  
| Income taxes |   |   | 33.6 |   |   |   | 31.8 |   |   |   | 104.4 |   |   |   | 117.1 |   |  
| Net income |   | $ | 138.1 |   |   | $ | 81.5 |   |   | $ | 298.8 |   |   | $ | 254.3 |   |    
| (1) | Contribution margin consists of net sales less cost of sales and Royalty overrides. For the China segment, contribution margin does not include service fees to China independent service providers. |  
| (2) | Service fees to China independent service providers totaling $124.1 million and $119.8 million for the three months ended September 30, 2020 and 2019, respectively, and $352.0 million and $304.5 million for the nine months ended September 30, 2020 and 2019, respectively, are included in selling, general, and administrative expenses. |  | 
| Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area | The following table sets forth net sales by geographic area:   
|   |   | Three Months Ended |   |   | Nine Months Ended |   |  
|   |   | September 30, 2020 |   |   | September 30, 2019 |   |   | September 30, 2020 |   |   | September 30, 2019 |   |  
|   |   | (in millions) |   |  
| Net sales: |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |  
| United States |   | $ | 386.7 |   |   | $ | 251.5 |   |   | $ | 1,033.9 |   |   | $ | 774.2 |   |  
| China |   |   | 220.0 |   |   |   | 208.7 |   |   |   | 619.4 |   |   |   | 546.1 |   |  
| Mexico |   |   | 110.3 |   |   |   | 116.5 |   |   |   | 321.6 |   |   |   | 357.0 |   |  
| Others |   |   | 804.8 |   |   |   | 667.8 |   |   |   | 2,156.2 |   |   |   | 1,979.5 |   |  
| Total net sales |   | $ | 1,521.8 |   |   | $ | 1,244.5 |   |   | $ | 4,131.1 |   |   | $ | 3,656.8 |   |    |