Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 331.7	$ 188.9
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	120.1	111.4
Depreciation, amortization, and accretion	95.6	94.6
Restructuring and other charges	194.4	16.5
Deferred income taxes	(82.3)	26.6
Gain on investments, net	(167.0)	(3.8)
Gain on legal settlement, net	(120.3)	0
Excess tax benefits from share-based compensation	(8.0)	(1.3)
Loss on disposal of fixed assets	0.8	0.1
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable, net	21.4	(92.3)
Prepaid expenses and other assets	149.2	(86.9)
Accounts payable	53.0	(3.4)
Accrued compensation	(39.5)	(64.0)
Income taxes payable	(38.3)	(18.5)
Other accrued liabilities	(61.7)	3.1
Deferred revenue	101.9	104.5
Net cash provided by operating activities	551.0	275.5
Cash flows from investing activities:
Purchases of property and equipment	(98.3)	(142.3)
Purchases of available-for-sale investments	(1,577.6)	(895.0)
Proceeds from sales of available-for-sale investments	1,504.6	587.5
Proceeds from maturities of available-for-sale investments	234.2	183.8
Purchases of trading investments	(2.4)	(2.1)
Proceeds from sales of privately-held investments	2.5	1.7
Purchases of privately-held investments	(5.0)	(14.4)
Payments for business acquisitions, net of cash and cash equivalents acquired	(27.1)	(10.0)
Purchase of licensed software	0	(10.0)
Changes in restricted cash	25.0	0
Net cash provided by (used in) investing activities	55.9	(300.8)
Cash flows from financing activities:
Proceeds from issuance of common stock	121.2	74.3
Purchases and retirement of common stock	(907.1)	(239.2)
Purchase of equity forward contract	(300.0)	0
Issuance of long-term debt, net	346.5	0
Payment for capital lease obligation	(0.4)	(1.4)
Customer financing arrangements	0.7	32.4
Excess tax benefits from share-based compensation	8.0	1.3
Net cash used in financing activities	(731.1)	(132.6)
Net decrease in cash and cash equivalents	(124.2)	(157.9)
Cash and cash equivalents at beginning of period	2,284.0	2,407.8
Cash and cash equivalents at end of period	$ 2,159.8	$ 2,249.9