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Benefits Plans (Asset Allocation Parameters by Asset Class) (Details)	Dec. 31, 2020
Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	53.00%
Equity [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	40.00%
Equity [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	60.00%
Large-Cap U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	36.00%
Mid/Small-Cap U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	12.00%
Non-U.S [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	5.00%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	47.00%
Fixed Income [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	40.00%
Fixed Income [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	60.00%
Long/Short Duration [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	44.00%
Money Market/Certificates of Deposit [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	3.00%

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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.

+ References

No definition available.

+ Details

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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