Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Transaction fees	$ 960.4	$ 994.9	$ 2,840.7	$ 2,931.8
Foreign exchange revenues	381.5	372.3	1,105.8	1,072.4
Other revenues	35.9	32.0	104.7	99.5
Total revenues	1,377.8	1,399.2	4,051.2	4,103.7
Expenses:
Cost of services	822.9	817.2	2,424.2	2,388.4
Selling, general and administrative	276.6	277.5	829.8	887.7
Total expenses	1,099.5	1,094.7	3,254.0	3,276.1
Operating income	278.3	304.5	797.2	827.6
Other income/(expense):
Interest income	1.1	3.0	2.7	8.4
Interest expense	(41.4)	(42.2)	(122.9)	(127.1)
Derivative gains, net	0.3	1.4	2.2	2.4
Other income/(expense), net	1.7	(1.3)	0.8	(6.4)
Total other expense, net	(38.3)	(39.1)	(117.2)	(122.7)
Income before income taxes	240.0	265.4	680.0	704.9
Provision for income taxes	23.1	33.1	71.8	79.4
Net income	$ 216.9	$ 232.3	$ 608.2	$ 625.5
Earnings per share:
Basic (in dollars per share)	$ 0.45	$ 0.46	$ 1.24	$ 1.21
Diluted (in dollars per share)	$ 0.44	$ 0.45	$ 1.23	$ 1.20
Weighted-average shares outstanding:
Basic (in shares)	487.0	509.6	492.4	515.3
Diluted (in shares)	490.3	513.2	495.5	519.4
Cash dividends declared per common share (in dollars per share)	$ 0.16	$ 0.155	$ 0.48	$ 0.465