Derivatives and Hedging Activities (Details Textuals) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Derivative [Line Items]
Carrying values of hedged liabilities	$ 3,500		$ 3,500		$ 8,700
Cumulative amount of fair value hedging adjustment	52		52		(2)
Net increase (decrease) in interest expense on long term debt and other	(15)	$ 21	(27)	$ 81
Other, Net [Member]
Derivative [Line Items]
Gain (loss) in changes in fair value of derivatives not designated as hedges	1	20	17	69
Fair Value Hedging [Member]
Derivative [Line Items]
Notional amount of long-term debt	3,500		3,500		8,800
Net Investment Hedges [Member]
Derivative [Line Items]
Notional amounts of derivatives	2,900		2,900		$ 3,000
Foreign Currency Translation Adjustment Gains (Losses) [Member]
Derivative [Line Items]
Gain (loss) on net investment hedges, net of taxes	$ (59)	$ 50	$ 71	$ 29