| **Retirement Plans (Assumptions Used) (Details)**                              | 12 Months Ended |
|--------------------------------------------------------------------------------|-----------------|
||
| Pension Benefits [Member]                                                      |            |   |   |
| **Defined Benefit Plan, Assumptions Used in Calculations [Abstract]**          |            |   |   |
| Discount rate - used at year end to value obligation (in hundredths)           | 4.90%           | 4.00% | 4.50% |
| Discount rate - used to compute annual cost (in hundredths)                    | 4.00%           | 4.50% | 5.25% |
| Expected long-term rate of return on plan assets (in hundredths)               | 8.00%           | 7.75% | 8.00% |
| Rate of increase in compensation levels (in hundredths)                        | 2.50%           | 2.50% | 2.50% |
| Postretirement Benefits Other Than Pensions (OPEB) [Member]                    |            |   |   |
| **Defined Benefit Plan, Assumptions Used in Calculations [Abstract]**          |            |   |   |
| Discount rate - used to compute annual cost (in hundredths)                    |            |   | 5.25% |
| Postretirement Benefits Other Than Pensions (OPEB) [Member] | Maximum [Member] |            |   |   |
| **Defined Benefit Plan, Assumptions Used in Calculations [Abstract]**          |            |   |   |
| Discount rate - used at year end to value obligation (in hundredths)           | 5.20%           | 4.20% | 4.75% |
| Discount rate - used to compute annual cost (in hundredths)                    | 4.20%           | 4.75% |   |
| Expected long-term rate of return on plan assets (in hundredths)               | 4.00%           | 4.00% | 6.00% |
| Postretirement Benefits Other Than Pensions (OPEB) [Member] | Minimum [Member] |            |   |   |
| **Defined Benefit Plan, Assumptions Used in Calculations [Abstract]**          |            |   |   |
| Discount rate - used at year end to value obligation (in hundredths)           | 4.90%           | 4.00% | 4.50% |
| Discount rate - used to compute annual cost (in hundredths)                    | 4.00%           | 4.50% |   |
| Expected long-term rate of return on plan assets (in hundredths)               | 3.00%           | 3.00% | 3.00% |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The interest rate used to adjust for the time value of money for the plan.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The interest rate used to adjust for the time value of money.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512013Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Expected rate of compensation increases (for pay-related plans).
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920
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| X                                                                                                                                                                                           |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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