Intangible Assets Including Goodwill - Intangible Assets Activity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
Intangible assets
Intangible assets, increase (decrease)				$ (1,544)
Intangible asset amortization expense	$ 577	$ 640		1,828	$ 1,880
Retirement of fully amortized intangible assets				$ 647
Divested businesses | Healthcare software assets divestiture
Intangible assets
Intangible assets, increase (decrease)			$ (1,313)
Accumulated amortization, increase (decrease)			$ (1,149)