Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows from Operating Activities
Net income	$ 1,160.7	$ 955.3
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	42.3	45.2
Amortization of purchased intangibles	72.0	74.8
Depreciation and amortization	95.5	97.5
Gain on sale of BM&FBOVESPA shares	(6.4)	(3.4)
Debt prepayment costs	0.0	61.8
Loss on datacenter	27.1	0.0
Undistributed earnings, net of losses, of unconsolidated subsidiaries	(29.3)	(15.2)
Deferred income taxes	(79.3)	49.8
Change in:
Accounts receivable	(18.7)	(22.3)
Other current assets	(12.5)	12.4
Other assets	9.5	(18.4)
Accounts payable	5.7	1.3
Income taxes payable	21.3	(70.1)
Other current liabilities	(67.3)	(31.3)
Other liabilities	(14.3)	(0.5)
Other	(0.7)	4.3
Net Cash Provided by Operating Activities	1,205.6	1,141.2
Cash Flows from Investing Activities
Proceeds from maturities of available-for-sale marketable securities	40.1	29.3
Purchases of available-for-sale marketable securities	(44.9)	(29.3)
Purchases of available-for-sale marketable securities	(62.9)	(90.3)
Investments in business ventures	(4.9)	(7.0)
Proceeds from Sale of Other Assets, Investing Activities	8.8	0.0
Proceeds from sale of BM&FBOVESPA shares	0.0	69.0
Settlement of derivative related to debt issuance	0.0	7.0
Net Cash Used in Investing Activities	(63.8)	(21.3)
Cash Flows from Financing Activities
Proceeds from debt, net of issuance costs	0.0	743.7
Repayment of debt	0.0	(673.0)
Cash dividends	(1,584.3)	(1,174.9)
Proceeds from finance lease obligation	130.0	0.0
Proceeds from exercise of stock options	29.5	51.8
Excess tax benefits related to employee option exercises and restricted stock vesting	10.0	6.7
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	0.0	(7.0)
Other	0.9	1.0
Net Cash Used in Financing Activities	(1,413.9)	(1,051.7)
Net change in cash and cash equivalents	(272.1)	68.2
Cash and cash equivalents, beginning of period	1,692.6	1,366.1
Cash and Cash Equivalents, End of Period	1,420.5	1,434.3
Supplemental Disclosure of Cash Flow Information
Income taxes paid	545.5	548.5
Interest paid	84.8	89.1
Accrued Proceeds from Sale of Investment	$ 20.8	$ 0.0