Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Non-amortizable intangible assets	$ 16,817	$ 17,296
Amortizable intangible assets	2,790	2,374
Total intangible assets, gross	19,607	19,670
Accumulated amortization	(1,730)	(1,713)
Intangible assets, net	$ 17,877	$ 17,957