Business and Summary of Significant Accounting Principles (Accounts Receivable and Allowance for Doubtful Receivables) (Details) |
12 Months Ended |
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Dec. 31, 2017 | |
| Accounting Policies [Abstract] | |
| Past due period | 120 days |
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- References No definition available.
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- Definition Threshold period past due for trade accounts receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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