CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities
Net income	$ 546.1	$ 419.5
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	45.4	46.7
Stock-based compensation expense	40.6	33.3
Deferred income taxes	46.2	10.8
Excess tax benefits from stock-based compensation plans	(45.2)	(27.0)
ICRA Gain	(102.8)	0
Changes in assets and liabilities:
Accounts receivable	(45.8)	2.4
Other current assets	(56.1)	(56.6)
Other assets	3.3	(0.8)
Accounts payable and accrued liabilities	(26.6)	(168.4)
Deferred revenue	62.2	59.6
Unrecognized tax benefits	5.8	34.5
Other liabilities	(15.1)	15.1
Net cash provided by operating activities	458.0	369.1
Cash flows from investing activities
Capital additions	(38.8)	(18.1)
Purchases of short-term investments	(39.8)	(17.5)
Sales and maturities of short-term investments	45.7	16.6
Net cash used in investing activities	(113.4)	(19.0)
Cash paid into escrow for ICRA share tender offer	(80.5)	0
Cash flows from financing activities
Repayments of notes		(63.8)
Net proceeds from stock-based compensation plans	40.2	60.8
Cost of treasury shares repurchased	(459.7)	(350.4)
Excess tax benefits from stock-based compensation plans	45.2	27.0
Payment of dividends	(119.2)	(89.1)
Payment of dividends to noncontrolling interests	(7.7)	(8.2)
Contingent consideration paid		(2.5)
Net cash used in financing activities	(501.2)	(426.2)
Effect of exchange rate changes on cash and cash equivalents	14.4	(46.3)
Net increase in cash and cash equivalents	(142.2)	(122.4)
Cash and cash equivalents, beginning of the period	1,919.5	1,755.4
Cash and cash equivalents, end of the period	$ 1,777.3	$ 1,633.0