Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Goodwill and Intangible Assets
Gross amount of amortizable intangible assets	$ 27,700	$ 27,700
Accumulated amortization of intangible assets	16,400	15,900
Increase (Decrease) in intangible assets due to foreign currency translation adjustments	3
Estimated annual amortization expense, intangible assets, 2022	2,100
Estimated annual amortization expense, intangible assets, 2023	2,000
Estimated annual amortization expense, intangible assets, 2024	1,900
Estimated annual amortization expense, intangible assets, 2025	1,700
Estimated annual amortization expense, intangible assets, 2026	1,600
Indefinite-lived intangible assets related to in-process R&D acquired in a business combination	$ 919	$ 919