v3.5.0.2

Earnings Per Common Share (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		6 Months Ended
	Dec. 14, 2015	Dec. 11, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Income (Loss) from Continuing Operations, Per Basic Share			$ 357,000,000.00	$ 283,000,000.00	$ 726,000,000.00	$ 598,000,000.00
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount					150,323	190,000
Interactive Data Holdings Corporation Acquisition [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 6.5
TRAYPORT [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 2.5

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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