Amount of deferred tax liability attributable to taxable temporary differences from tax deferred revenue or income classified as other.

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Income Tax - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Tax - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020
Operating Loss Carryforwards [Line Items]
Discrete tax liability			$ 6.0
North America
Operating Loss Carryforwards [Line Items]
Goodwill, Impairment Loss		$ 668.3
Minimum
Operating Loss Carryforwards [Line Items]
Estimated income tax expense	$ 135.0		$ 135.0