Goodwill and other intangible assets (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization charges associated with finite-lived intangible assets	$ 709	$ 315
Total estimated amortization of finite-lived intangible assets for the six months ending December 31, 2019	2,100
Total estimated amortization of finite-lived intangible assets for 2020	2,600
Total estimated amortization of finite-lived intangible assets for 2021	2,500
Total estimated amortization of finite-lived intangible assets for 2022	2,400
Total estimated amortization of finite-lived intangible assets for 2023	2,400
Total estimated amortization of finite-lived intangible assets for 2024	$ 2,200