Stockholders' Equity - Narrative (Detail) - USD ($) $ / shares in Units, shares in Millions	1 Months Ended	3 Months Ended
	Nov. 04, 2024	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2024
Stockholders Equity [Line Items]
Shares repurchased		$ 253,000,000	$ 252,000,000
Class A and Class B Common Stock
Stockholders Equity [Line Items]
Stock repurchase program, authorized amount		7,000,000,000
Remaining buyback authorization amount		$ 1,150,000,000
Class A Common Stock
Stockholders Equity [Line Items]
Common stock, par value (in dollars per share)		$ 0.01		$ 0.01
Shares repurchased (in shares)		6.0
Shares repurchased		$ 250,000,000
Cash dividend per share (in dollars per share)		$ 0.27	$ 0.26
Class A Common Stock | Subsequent Event
Stockholders Equity [Line Items]
Shares repurchased (in shares)	1.2
Shares repurchased	$ 50,000,000
Class B Common Stock
Stockholders Equity [Line Items]
Common stock, par value (in dollars per share)		0.01		$ 0.01
Cash dividend per share (in dollars per share)		$ 0.27	$ 0.26