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Non-controlling interest - Narrative (Details)
shares in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
shares
Noncontrolling Interest [Line Items]      
Distributions | $ $ 0 $ 0  
Noncontrolling interest holders      
Noncontrolling Interest [Line Items]      
Ownership interest held by non-controlling interest holders 0.436 0.480  
LLC Units      
Noncontrolling Interest [Line Items]      
Conversion ratio 1    
Redemption of LLC Units (in shares) 2.4 1.5  
LLC Units | Noncontrolling interest holders      
Noncontrolling Interest [Line Items]      
Redemption of LLC Units (in shares) 2.4 1.5 2.6
Class A Common Stock      
Noncontrolling Interest [Line Items]      
Redemption of LLC Units (in shares) 2.4 1.5  
Class B Common Stock      
Noncontrolling Interest [Line Items]      
Redemption of LLC Units (in shares) 2.4 1.5