Business and Summary of Significant Accounting Principles (Impairment of Intangibles, Goodwill, and Long-lived Assets) (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Accounting Policies [Abstract] | ||||
| Goodwill and intangible asset impairment | $ 0 | $ 0 | $ 0 | $ 0 |
| Impairment of long-lived assets | $ 0 | $ 0 | ||
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. No definition available.
|
| X | ||||||||||
- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|