Significant Accounting Policies (Details) - USD ($) $ in Millions		2 Months Ended	9 Months Ended
	Jul. 21, 2023	Sep. 30, 2023	Sep. 30, 2023
Business Acquisition [Line Items]
Goodwill		$ 56	$ 56
Scholly, Inc.
Business Acquisition [Line Items]
Goodwill	$ 5
Acquisition transaction costs		$ 1
Identifiable intangible assets aggregate fair value at acquisition date	$ 11
Weighted average useful life of acquired intangible assets			3 years 10 months 24 days
Scholly, Inc. | Minimum
Business Acquisition [Line Items]
Weighted average useful life of acquired intangible assets	2 years
Scholly, Inc. | Maximum
Business Acquisition [Line Items]
Weighted average useful life of acquired intangible assets	4 years