CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 384.9	$ 401.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	23.2	18.6
Amortization	67.7	42.0
Provision for accounts receivable allowances	1.9	2.7
Deferred income taxes	(53.1)	(166.5)
Impairment charges	9.3	22.1
Change in value of contingent consideration	33.2	(12.4)
Share-based compensation expense	65.6	57.2
Share-based employee benefit plan expense	7.6	3.8
Reclassification adjustment for cash flow hedges included in net income	7.2	(19.1)
Unrealized change in value of derivative instruments	(33.8)	9.2
Realized (gains) losses on marketable securities available for sale	0.9	(0.4)
Other, net	3.0	(4.5)
Change in current assets and liabilities, excluding the effect of acquisitions:
Accounts receivable	(87.0)	(79.3)
Inventory	(25.8)	(25.5)
Other operating assets	35.7	101.0
Assets held for sale, net		(0.1)
Accounts payable and other operating liabilities	(82.3)	(40.7)
Income tax payable	7.7	30.5
Deferred revenue	1.4	4.3
Net cash provided by operating activities	367.3	344.4
Cash flows from investing activities:
Proceeds from sales of marketable securities available for sale	896.0	485.5
Purchases of marketable securities available for sale	(1,115.5)	(105.8)
Payments for acquisition of business, net of cash acquired		(352.2)
Purchases of intellectual property and other assets	(0.7)
Capital expenditures	(25.4)	(28.1)
(Purchases) refunds of investment securities	(5.5)	(5.0)
Other investing activities	(0.4)	(0.8)
Net cash (used in) provided by investing activities	(251.5)	(6.4)
Cash flows from financing activities:
Payment for treasury shares	(1,043.7)	(202.7)
Proceeds from short-term borrowing	1,422.9	1,045.9
Principal repayments on short-term borrowing	(1,369.6)	(1,421.3)
Net proceeds from exercise of common stock options and warrants	266.4	215.5
Excess tax benefit from share-based compensation arrangements	36.6	18.6
Net cash (used in) provided by financing activities	(687.4)	(344.0)
Effect of currency rate changes on cash and cash equivalents	(23.2)	7.6
Net (decrease) increase in cash and cash equivalents	(594.8)	1.6
Cash and cash equivalents at beginning of period	2,090.4	1,859.5
Cash and cash equivalents at end of period	1,495.6	1,861.1
Supplemental schedule of non-cash investing and financing activity:
Change in net unrealized (gain) loss on marketable securities available for sale	2.0	(2.4)
Matured shares tendered in connection with stock option exercises	(0.1)	(0.2)
Supplemental disclosure of cash flow information:
Interest paid	22.3	1.0
Income taxes paid	$ 76.6	$ 85.4