Organization and Summary of Significant Accounting Policies Organization and Summary of Significant Accounting Policies (Revenue and Membership Information) (Details) membership in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019 USD ($) membership	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) membership	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) membership	Dec. 31, 2018 USD ($) membership	Dec. 31, 2017 USD ($) membership
Disaggregation of Revenue [Line Items]
Revenues | $	$ 5,467,434	$ 5,244,905	$ 4,923,116	$ 4,520,992	$ 4,186,841	$ 3,999,374	$ 3,907,270	$ 3,700,856	$ 20,156,447	$ 15,794,341	$ 11,692,713
United States and Canada
Disaggregation of Revenue [Line Items]
Paid net membership additions (in memberships)									2,905	6,335	5,512
Paid memberships at end of period (in memberships)	67,662				64,757				67,662	64,757	58,422
Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Paid net membership additions (in memberships)									13,960	11,814	8,173
Paid memberships at end of period (in memberships)	51,778				37,818				51,778	37,818	26,004
Latin America
Disaggregation of Revenue [Line Items]
Paid net membership additions (in memberships)									5,340	6,360	5,509
Paid memberships at end of period (in memberships)	31,417				26,077				31,417	26,077	19,717
Asia-Pacific
Disaggregation of Revenue [Line Items]
Paid net membership additions (in memberships)									5,626	4,106	2,360
Paid memberships at end of period (in memberships)	16,233				10,607				16,233	10,607	6,501
Streaming | United States and Canada
Disaggregation of Revenue [Line Items]
Revenues | $									$ 10,051,208	$ 8,281,532	$ 6,660,859
Streaming | Europe, Middle East, and Africa
Disaggregation of Revenue [Line Items]
Revenues | $									5,543,067	3,963,707	2,362,813
Streaming | Latin America
Disaggregation of Revenue [Line Items]
Revenues | $									2,795,434	2,237,697	1,642,616
Streaming | Asia-Pacific
Disaggregation of Revenue [Line Items]
Revenues | $									$ 1,469,521	$ 945,816	$ 575,928