Acquisitions (Details) - USD ($) $ in Millions	1 Months Ended
	Jul. 31, 2018	Jan. 31, 2018	Oct. 31, 2017	Sep. 30, 2018	Jul. 30, 2018	Jun. 30, 2018
The preliminary purchase price allocation for GCC is as follows:
Goodwill				$ 2,325.0		$ 2,243.5
Global Cash Card, Inc.
Business Acquisition [Line Items]
Date of acquisition agreement			Oct. 05, 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
Other assets			0.8
Total assets acquired			539.4
Total liabilities assumed			$ 48.4
Word Market, Inc.
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%