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Net Income per Share (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Amount authorized under stock repurchase program	$ 1,500.0		$ 1,500.0
Available for repurchase under the stock repurchase program	$ 124.9		$ 124.9
Class A Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares repurchased (in shares)	1,600,000		1,600,000
Shares acquired, average cost per share (in USD per share)	$ 6.48		$ 6.48
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from EPS (in shares)	4,200,000	3,400,000	4,200,000	200,000
Convertible Debt Securities
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from EPS (in shares)		11,300,000
4.25% Convertible Senior Notes due 2029 \| Convertible Debt
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest rate	4.25%	4.25%	4.25%	4.25%	4.25%