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Acquisition - Preliminary Estimated Fair Value and Useful Lives (Details) $ in Millions	Sep. 30, 2021 USD ($)
Finite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Estimated Fair Value	$ 111
ShowingTime.com, Inc. | Customer relationships
Finite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Estimated Fair Value	$ 55
Estimated Weighted-Average Useful Life (in years)	8 years
ShowingTime.com, Inc. | Developed technology
Finite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Estimated Fair Value	$ 47
Estimated Weighted-Average Useful Life (in years)	4 years
ShowingTime.com, Inc. | Trade names and trademarks
Finite-Lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Estimated Fair Value	$ 9
Estimated Weighted-Average Useful Life (in years)	10 years

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- Definition

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+ References

No definition available.

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
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