Interest and Other Income (Loss), Net - Components of Interest and Other Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest and Other Income [Abstract]
Investment in affiliate fair value adjustment (Note 4)	$ (8)	$ (18)	$ 21	$ (119)
Deferred compensation plan income	3	6	11	3
Contingent consideration fair value adjustment (Note 5)	0	22	0	(42)
Other	7	3	10	13
Interest and other income (loss), net	$ 2	$ 13	$ 42	$ (145)