Acquisitions (Details) - USD ($) $ in Millions	1 Months Ended
	Jul. 31, 2018	Jan. 31, 2018	Oct. 31, 2017	Mar. 31, 2019	Dec. 31, 2018	Jul. 30, 2018	Jun. 30, 2018
The preliminary purchase price allocation for GCC is as follows:
Goodwill				$ 2,316.1			$ 2,243.5
Global Cash Card, Inc.
Business Acquisition [Line Items]
Date of acquisition agreement			Oct. 07, 2017
Percentage of shares acquired			100.00%
Acquisition price			$ 490.0
Acquired finite-lived intangible assets, weighted average useful life			8 years
The preliminary purchase price allocation for GCC is as follows:
Goodwill					$ 406.1
Identifiable intangible assets			$ 132.5		132.5
Other assets					0.8
Total assets acquired					539.4
Total liabilities assumed					$ 48.4
Work Market, Inc. [Member]
Business Acquisition [Line Items]
Date of acquisition agreement		Jan. 19, 2018
Percentage of shares acquired		100.00%
Acquisition price		$ 125.0
Celergo Holdings, Inc.
Business Acquisition [Line Items]
Date of acquisition agreement	Jul. 01, 2018
Percentage of shares acquired						100.00%