Short-Term Borrowings and Long-Term Debt (Schedule Related to the Classification of Debt Interest Rate) (Details) - Fixed Rate [Member]	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Weighted average rate	2.26%	2.63%
Matures through	2036	2036
Maximum
Debt Instrument [Line Items]
Interest rate	2.92%	2.92%
Minimum
Debt Instrument [Line Items]
Interest rate	1.00%	1.00%

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant