Segments - Revenue Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue
Revenue	$ 14,197	$ 13,187	[1]
Business Segments
Revenue
Revenue	13,973	12,902
Other
Revenue
Other - divested businesses	154	197
Other revenue	$ 70	$ 87

[1] Reclassified to reflect discontinued operations presentation.