Goodwill and Other Intangible Assets, net (Other Intangible Assets Disclosure) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite-lived intangible assets	$ 11,676	$ 11,676
Definite-lived intangible assets	1,275	1,275
Total other intangible assets	12,951	12,951
Definite-lived intangible assets, accumulated amortization	$ 336	$ 264