Revenue Recognition (Remaining Performance Obligations and Practical Expedients) (Details) |
6 Months Ended |
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Jun. 30, 2018 | |
| Revenue From Contract With Customer [Abstract] | |
| Practical expedient, incremental cost of obtaining contract | True |
| Optional exemption, performance obligation | True |
| X | ||||||||||
- Definition Indicates (true false) whether optional exemption was applied not to disclose amount of transaction price allocated to and explanation of expected timing of revenue recognition for remaining performance obligation, when contract has expected duration of one year or less or right to consideration corresponds directly to performance completed. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Description of consideration that is not included in transaction price and not allocated to remaining performance obligation. Includes, but is not limited to, variable consideration that is constrained. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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