Stockholders Equity - Narrative (Detail) $ / shares in Units, shares in Millions		1 Months Ended			3 Months Ended
	Feb. 08, 2023 $ / shares	Nov. 02, 2023 USD ($) shares	Aug. 31, 2023 $ / shares shares	Feb. 28, 2023 USD ($) transaction shares	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares	Jun. 30, 2023 $ / shares
Stockholders Equity [Line Items]
Stock repurchase program, number of transactions accounted for | transaction				2
Shares repurchased					$ 252,000,000	$ 250,000,000
Class A and Class B Common Stock
Stockholders Equity [Line Items]
Stock repurchase program, authorized amount					7,000,000,000
Remaining buyback authorization amount					$ 2,150,000,000
Class A Common Stock
Stockholders Equity [Line Items]
Common stock, par value (in dollars per share) | $ / shares					$ 0.01		$ 0.01
Shares repurchased (in shares) | shares					15.4
Shares repurchased					$ 250,000,000
Cash dividend per share (in dollars per share) | $ / shares					$ 0.26	$ 0.25
Class A Common Stock | Subsequent Event
Stockholders Equity [Line Items]
Shares repurchased (in shares) | shares		1.6
Shares repurchased		$ 50,000,000
Class B Common Stock
Stockholders Equity [Line Items]
Common stock, par value (in dollars per share) | $ / shares					0.01		$ 0.01
Cash dividend per share (in dollars per share) | $ / shares					$ 0.26	$ 0.25
Accelerated Share Repurchase | Class A Common Stock
Stockholders Equity [Line Items]
Accelerated share repurchases, amount of payment to third party financial institution				$ 1,000,000,000
Shares repurchased (in shares) | shares			7.8	22.5
Percentage of accelerated share repurchases of shares expected to be repurchased				80.00%
Accelerated share repurchases, initial price paid per share (in dollars per share) | $ / shares	$ 35.54		$ 33.03