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Share Repurchase Authorizations - Repurchase Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Class A common stock
Class of Stock [Line Items]
Shares repurchased (in shares)	965	772	1,775	3,349
Weighted-average price per share (in USD per share)	$ 52.57	$ 35.52	$ 48.71	$ 46.13
Total purchase price	$ 50	$ 27	$ 86	$ 154
Class C capital stock
Class of Stock [Line Items]
Shares repurchased (in shares)	932	4,225	5,411	13,943
Weighted-average price per share (in USD per share)	$ 52.80	$ 35.18	$ 46.15	$ 44.40
Total purchase price	$ 50	$ 149	$ 250	$ 619

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