Other Income/(Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	$ 612	$ 451
Investment-related interest income	72	162
Unrecognized Tax Benefits, Interest on Income Taxes Expense	(3)	(23)
Gain (Loss) on Investments	899	(32)
Gains (Losses) On Changes In Investments In Affiliates	166	15
Royalty income	171	89
Other	(45)	18
Total	$ 1,872	$ 680