Chargeback Liability (Details) - Chargeback Reserves [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Chargeback liabilities, beginning balance	$ 142.1	$ 134.5	$ 128.1
Add: Provisions	168.9	118.1	108.6
Deduct: Chargebacks	(140.0)	(110.5)	(102.2)
Chargeback liabilities, ending balance	$ 171.0	$ 142.1	$ 134.5