Derivatives and Hedging Activities (Details Textuals) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Derivative [Line Items]
Derivative asset not offset	$ 0		$ 0		$ 0
Derivative liabilities not offset	0		0		0
Carrying values of hedged liabilities	5,100,000,000		5,100,000,000		8,700,000,000
Cumulative amount of fair value hedging adjustment	64,000,000		64,000,000		(2,000,000)
Net increase (decrease) in interest expense on long term debt and other	(14,000,000)	$ 28,000,000	(12,000,000)	$ 60,000,000
Other Expense [Member]
Derivative [Line Items]
Gain (loss) in changes in fair value of derivatives not designated as hedges	5,000,000	26,000,000	16,000,000	49,000,000
Fair Value Hedging [Member]
Derivative [Line Items]
Notional amount of long-term debt	5,000,000,000.0		5,000,000,000.0		8,800,000,000
Net Investment Hedges [Member]
Derivative [Line Items]
Notional amounts of derivatives	2,800,000,000		2,800,000,000		$ 3,000,000,000.0
Foreign Currency Translation Adjustment Gains (Losses) [Member]
Derivative [Line Items]
Gain (loss) on net investment hedges, net of taxes	$ (216,000,000)	$ 36,000,000	$ 130,000,000	$ (21,000,000)