Net Income per Share (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from EPS (in shares)	200,000	400,000
Amount authorized under stock repurchase program	$ 1,500,000,000
Available for repurchase under the stock repurchase program	$ 135,300,000
Class A Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares repurchased (in shares)	0	0