Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities:
Net income	$ 2,121	$ 1,638	$ 2,228
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	84	82	85
Amortization of intangibles	122	98	96
Provision for losses on accounts receivable	21	16	9
Deferred income taxes	81	0	79
Stock-based compensation	94	99	76
Gain on disposition	0	0	(1,101)
Accrued legal settlements	1	55	54
Other	52	96	30
Changes in operating assets and liabilities, net of effect of acquisitions and dispositions:
Accounts receivable	(164)	(196)	(177)
Prepaid and other current assets	(1)	10	5
Accounts payable and accrued expenses	(106)	75	19
Unearned revenue	70	85	107
Accrued legal settlements	(108)	(4)	(150)
Other current liabilities	(67)	(85)	(19)
Net change in prepaid/accrued income taxes	(7)	32	174
Net change in other assets and liabilities	(129)	15	45
Cash provided by operating activities	2,064	2,016	1,560
Investing Activities:
Capital expenditures	(113)	(123)	(115)
Acquisitions, net of cash acquired	(401)	(83)	(177)
Contingent consideration payment	0	0	(34)
Proceeds from dispositions	6	2	1,498
Changes in short-term investments	(5)	(5)	(1)
Cash (used for) provided by investing activities	(513)	(209)	1,171
Financing Activities:
Payments on short-term debt, net	0	0	(143)
Proceeds from issuance of senior notes, net	489	0	493
Payments on senior notes	(403)	0	(421)
Dividends paid to shareholders	(503)	(421)	(380)
Distributions to noncontrolling interest holders	(154)	(111)	(116)
Repurchase of treasury shares	(1,660)	(1,001)	(1,123)
Exercise of stock options	34	75	88
Contingent consideration payment	0	0	(5)
Purchase of additional CRISIL shares	(25)	0	0
Employee withholding tax on share-based payments	(66)	(49)	(55)
Cash used for financing activities	(2,288)	(1,507)	(1,662)
Effect of exchange rate changes on cash	(84)	87	(158)
Net change in cash, cash equivalents, and restricted cash	(821)	387	911
Cash, cash equivalents, and restricted cash at beginning of year	2,779	2,392	1,481
Cash, cash equivalents, and restricted cash at end of year	1,958	2,779	2,392
Cash paid during the year for:
Interest	151	139	150
Income taxes	$ 558	$ 709	$ 683