Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of purchased intangibles	$ 287	$ 290	$ 305
Intangible assets subject to amortization	2,508	2,846
Intangible assets not subject to amortization	2,947	2,965
Other intangible assets	$ 5,455	$ 5,811