Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities:
Net (loss) income	$ (13)us-gaap_ProfitLoss	$ 1,466us-gaap_ProfitLoss	$ 492us-gaap_ProfitLoss
Less: income (loss) from discontinued operations	178	592	(209)
Net (loss) income from continuing operations	(191)	874	701
Adjustments to reconcile (loss) income from continuing operations to cash provided by operating activities from continuing operations:
Depreciation	86	86	93
Amortization of intangibles	48	51	48
Provision for losses on accounts receivable	11us-gaap_ProvisionForDoubtfulAccounts	22us-gaap_ProvisionForDoubtfulAccounts	32us-gaap_ProvisionForDoubtfulAccounts
Deferred income taxes	(245)us-gaap_DeferredIncomeTaxExpenseBenefit	43us-gaap_DeferredIncomeTaxExpenseBenefit	53us-gaap_DeferredIncomeTaxExpenseBenefit
Stock-based compensation	100us-gaap_ShareBasedCompensation	96us-gaap_ShareBasedCompensation	90us-gaap_ShareBasedCompensation
Accrued legal and regulatory settlements	1,587	0	0
Other	80us-gaap_OtherNoncashIncomeExpense	96us-gaap_OtherNoncashIncomeExpense	3us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities, net of effect of acquisitions and dispositions:
Accounts receivable	(9)	(35)	(250)
Prepaid and other current assets	(7)	(29)	3
Accounts payable and accrued expenses	(130)	(94)	73
Unearned revenue	78	109	23
Other current liabilities	(51)	(89)	(68)
Net change in prepaid / accrued income taxes	(93)	(238)	119
Net change in other assets and liabilities	(55)	(110)	(190)
Cash provided by operating activities from continuing operations	1,209	782	730
Investing Activities:
Capital expenditures	(92)	(117)	(96)
Acquisitions, including contingent payments, net of cash acquired	(71)	(47)	(177)
Proceeds from dispositions	83	51	0
Changes in short-term investments	15	(17)	27
Cash used for investing activities from continuing operations	(65)	(130)	(246)
Financing Activities:
(Payments on) / additions to short-term debt	0	(457)	457
Payments on senior notes	0us-gaap_RepaymentsOfShortTermDebt	0us-gaap_RepaymentsOfShortTermDebt	(400)us-gaap_RepaymentsOfShortTermDebt
Dividends paid to shareholders	(326)us-gaap_PaymentsOfDividendsCommonStock	(308)us-gaap_PaymentsOfDividendsCommonStock	(984)us-gaap_PaymentsOfDividendsCommonStock
Dividends and other payments paid to noncontrolling interests	(84)	(75)	(24)
Repurchase of treasury shares	(362)	(978)	(295)
Exercise of stock options	193	258	299
Contingent payments	(11)us-gaap_PaymentsForPreviousAcquisition	(12)us-gaap_PaymentsForPreviousAcquisition	0us-gaap_PaymentsForPreviousAcquisition
Purchase of additional CRISIL shares	0	(214)	0
Excess tax benefits from share-based payments	128	43	42
Cash used for financing activities from continuing operations	(462)	(1,743)	(905)
Effect of exchange rate changes on cash from continuing operations	(65)	(1)	5
Cash provided by (used for) continuing operations	617	(1,092)	(416)
Cash provided by (used for) operating activities	18	(231)	537
Cash provided by (used for) investing activities	320	2,129	(199)
Cash used for financing activities	0	(25)	(12)
Effect of exchange rate changes on cash	0	1	3
Effect of change in cash and equivalents	0	0	12
Cash provided by discontinued operations	338	1,874	341
Net change in cash and equivalents	955	782	(75)
Cash and equivalents at beginning of year	1,542	760	835
Cash and equivalents at end of year	2,497	1,542	760
Cash paid during the year for:
Interest (including discontinued operations)	50us-gaap_InterestPaidNet	50us-gaap_InterestPaidNet	77us-gaap_InterestPaidNet
Income taxes (including discontinued operations)	$ 419us-gaap_IncomeTaxesPaidNet	$ 787us-gaap_IncomeTaxesPaidNet	$ 243us-gaap_IncomeTaxesPaidNet

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Payments to Acquire Businesses Including Contingent Payments, Net of Cash Acquired

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.

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Amount of cash inflow (outflow) of investing activities of discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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The effect of exchange rate changes on cash balances in continuing operations held in foreign currencies.

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Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

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The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid.

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Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed.

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Cash outflow representing an adjustment to the purchase price of a previous acquisition.

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The net amount paid (received) by the reporting entity through acquisition or sale and maturities of short-term investments with an original maturity that is three months or less which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.

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The cash outflow to reacquire common stock during the period.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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Amount of cash outflow in the form of ordinary dividends provided by the non-wholly owned subsidiary to noncontrolling interests.

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The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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The net cash inflow or outflow for borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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