Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.21.2
Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
Jul. 26, 2021
Jul. 22, 2021
Jun. 30, 2021
Mar. 05, 2021
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Proceeds from Initial Public Offering $ 1,300.0      
Proceeds from public offering after option fully exercised 1,500.0      
Subsequent Event [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Percentage of vested interest required to be sold   15.00%    
Percentage of vested interest required to be sold, additional percentage   10.00%    
Percentage of purchased interest to be sold   100.00%    
Percentage of units sold   100.00%    
Percentage of cash savings paid   85.00%    
Percentage of member units sold   100.00%    
Subsequent Event [Member] | Revolving Credit Facility [Member] | Maximum [Member]        
Subsequent Event [Line Items]        
Increase in the principal of the Revolving Credit Facility 600.0      
Subsequent Event [Member] | Revolving Credit Facility [Member] | Minimum [Member]        
Subsequent Event [Line Items]        
Increase in the principal of the Revolving Credit Facility $ 300.0      
Subsequent Event [Member] | Management Incentive Units [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Share based payment arrangement, Options grant in period   2,116,667    
Subsequent Event [Member] | Restricted LLC Units [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Share based payment arrangement, Options grant in period   1,543,277    
Subsequent Event [Member] | Equity Award [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Share based payment arrangement, Options grant in period   8,171,522    
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Share based payment arrangement, Options grant in period   4,444,911    
Subsequent Event [Member] | Share-based Payment Arrangement, Option [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Share based payment arrangement, Options grant in period   66,667    
Subsequent Event [Member] | Two Thousand And Twenty One Omni bus Incentive Plan [Member] | Top Up Options [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Share based payment arrangement, Options grant in period   4,637,622    
Number of securities called by option exercisable   1    
Subsequent Event [Member] | Holders Of Member Units [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Consideration transferred   $ 72.9    
Subsequent Event [Member] | Holders Of Member Units [Member] | Consideration For Certain Tax Attributes [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Consideration transferred   36.5    
Subsequent Event [Member] | Holders Of Member Units [Member] | Consideration For Exchange [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Consideration transferred   $ 36.4    
Subsequent Event [Member] | Options Granted For Exchange [Member] | Management Incentive Units [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Share based payment arrangement, Options grant in period   3,911,482    
Member Units [Member] | Subsequent Event [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares, Conversion of units   736,435    
Partners capital units converted   11,540,324    
Member Units [Member] | Subsequent Event [Member] | Incentive Units [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares, Conversion of units   27,493,190    
Member Units [Member] | Subsequent Event [Member] | Reclassification Of Existing Units [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Common shares units outstanding   213,693,861    
Member Units [Member] | Subsequent Event [Member] | Reclassification Of Common Units [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Common shares units outstanding   20,680,420    
Member Units [Member] | Subsequent Event [Member] | Holders Of RSG LLC [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Payments to acquire interest   $ 795.7    
Number of shares acquired during period   35,641,682    
Member Units [Member] | Subsequent Event [Member] | RSG LLC [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Payments to acquire interest   $ 119.9    
Number of shares acquired during period   5,889,570    
Preferred Units [Member] | Subsequent Event [Member] | Onex [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Payments to acquire interest   $ 343.5    
Number of shares acquired during period   260,000,000    
IPO [Member] | Subsequent Event [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares 56,918,278      
Common Class A [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Common stock, Par value     $ 0.001 $ 0.001
Common Class A [Member] | Subsequent Event [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares, Conversion of units   20,680,420    
Common stock conversion basis   one-for-one    
Common Class A [Member] | Subsequent Event [Member] | Patrick G Ryan Founder Chairman And Chief Executive Officer [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares, Conversion of units   11,540,324    
Common Class A [Member] | Subsequent Event [Member] | Current And Past Employees And ExistingInvestors In RSG LLC [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares, Conversion of units   38,143,990    
Common Class A [Member] | Subsequent Event [Member] | Current And Former Employee Holders Of Incentive Units [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares, Conversion of units   11,426,502    
Common Class A [Member] | IPO [Member] | Subsequent Event [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares 56,918,278      
Common stock, Par value $ 0.001      
Shares issued, Price per share $ 23.50      
Proceeds from Initial Public Offering   $ 1,300.0    
Proceeds from public offering after option fully exercised $ 1,500.0      
Common Stock, Voting Rights 41.7      
Common Class A [Member] | IPO [Member] | Subsequent Event [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Proceeds from public offering after option fully exercised $ 1,500.0      
Common Class A [Member] | IPO [Member] | Common Stock [Member] | Subsequent Event [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares   56,918,278    
Common stock, Par value   $ 0.001    
Shares issued, Price per share   $ 23.50    
Proceeds from Initial Public Offering   $ 1,300.0    
Common Class A [Member] | Over-Allotment Option [Member] | Subsequent Event [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares 65,456,020      
Common Class A [Member] | Over-Allotment Option [Member] | Subsequent Event [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Stock issued during period shares 65,456,020      
Common Class B [Member] | Subsequent Event [Member] | Parent Company [Member]        
Subsequent Event [Line Items]        
Common stock conversion basis   one-to-one