Revenue Recognition - Deferred Revenue (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue Recognition [Abstract]
Balance at beginning of period	$ 114.9	$ 98.6	$ 108.3	$ 89.1
New contracts sold	12.3	14.9	27.8	32.6
Less: reductions for revenue recognized	(13.6)	(8.0)	(22.5)	(16.2)
Balance at end of period	$ 113.6	$ 105.5	$ 113.6	$ 105.5

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.

No definition available.

Name:	us-gaap_DeferredRevenueAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration