Derivatives and Hedging Activities (Details Textuals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Derivative [Line Items]
Derivatives, hedged liabilities	$ 3,500		$ 3,500
Cumulative amount of fair value hedging adjustment	29		40
Net (decrease) increase in interest expense on long term debt	(12)	$ 2
Other, Net
Derivative [Line Items]
Gain (loss) in changes in fair value of derivatives not designated as hedges	(1)	11
Fair Value Hedging
Derivative [Line Items]
Derivatives, hedged liabilities	3,500		3,500
Net Investment Hedges
Derivative [Line Items]
Notional amounts of derivatives	3,100		$ 2,900
Gain on net investment hedges, net of taxes	$ 6	$ 346