Fair Value of Financial Instruments (Narrative) (Details) $ in Millions	9 Months Ended
Sep. 30, 2019 USD ($) item
Derivative [Line Items]
Interest income arising from spread in fixed and floating rates of interest rate swap agreements that will be recognized in next 12 months	$ 1
Interest Rate Swap [Member]
Derivative [Line Items]
Number of interest rate swaps \| item	1
Aggregate notional amount	$ 300
Derivative fixed interest rate	2.892%
Derivative termination date	Aug. 30, 2020
Derivative liability fair value	$ 3

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

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- Definition

Nominal or face amount used to calculate payments on the derivative liability.

+ References

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The number of derivative instruments of a particular derivative liability or group of derivative liabilities held by the entity.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

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- Definition

The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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