Intangible Assets Including Goodwill - Intangible Assets Activity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Intangible assets
Intangible assets, increase (decrease)			$ (940)
Intangible asset amortization expense	$ 625	$ 625	1,251	$ 1,239
Retirement of fully amortized intangible assets			501
Divested businesses | Healthcare software assets divestiture
Intangible assets
Intangible assets, increase (decrease)			(1,312)
Accumulated amortization, increase (decrease)			$ (1,149)