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Revenue Recognition - Deferred Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Revenue Recognition [Abstract] |  |  |  |
Balance at beginning of period | $ 116.6 | $ 85.6 | $ 107.1 | $ 81.6
New contracts sold | 18.0 | 13.6 | 38.6 | 26.8
Less: reductions for revenue recognized | (10.9) | (9.4) | (22.0) | (18.6)
Balance at end of period | $ 123.7 | $ 89.8 | $ 123.7 | $ 89.8

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- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(5)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References No definition available. + Details
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- Definition Amount of revenue recognized that was previously reported as deferred or unearned revenue. + References No definition available. + Details
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Balance Type: | credit
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- References No definition available. + Details
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