Summary of Significant Accounting Principles (Contract Balances) (Details) - USD ($) $ in Millions |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Accounting Policies [Abstract] | ||
| Receivables | $ 246.9 | $ 198.8 |
| Deferred revenue | $ 41.0 | $ 31.7 |
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- References No definition available.
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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