Derivatives and Hedging Activities (Details 1) - Interest Expense [Member] - Interest Rate Contracts [Member] - Fair Value Hedging [Member] - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Fixed-rate long-term debt	$ 0	$ (88)	$ (66)	$ (155)
Derivatives designated as hedging instruments	(7)	92	72	157
Total	$ (7)	$ 4	$ 6	$ 2

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

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Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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