Description of Business, Accounting Policies, and Supplemental Disclosures - Digital Video and Music Content (Details) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Weighted average remaining life, capitalized video content	2 years 7 months 6 days
Video and music content, capitalized costs	$ 10.7	$ 6.8
Video and music content, expense	$ 13.0	$ 11.0