Change in Accounting Principle - Changes in Balance Sheet Items (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Common units	$ 0			$ 45,122
Additional paid-in capital	7,813,384			25,036
Accumulated other comprehensive income (loss)	86			(31,093)
Accumulated deficit	(5,245,538)			(4,107,927)
Total stockholders'/members’ equity (deficit)	$ 2,568,106	$ 2,802,629	$ 3,275,125	(4,068,862)	$ (3,976,608)	$ (3,811,142)	$ (3,665,081)	$ (3,532,912)
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Common units				54,950
Additional paid-in capital				25,036
Accumulated other comprehensive income (loss)				(31,093)
Accumulated deficit				(4,117,755)
Total stockholders'/members’ equity (deficit)				$ (4,068,862)