CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income	$ 293	$ 202
Adjustment for discontinued operations	3	9
Adjustments to reconcile net income to net cash provided by operating activities from continuing operations:
Depreciation and other amortization	94	96
Amortization of acquisition-related intangible assets	81	77
Share-based compensation	25	21
Deferred income taxes	(2)	2
Loss on early debt extinguishment		61
Settlement of interest rate hedge contracts		(6)
Other non-cash items	(16)	(14)
Changes in assets and liabilities, net of effects from acquisitions:
Trade accounts receivable	61	28
Prepaid expenses and other assets	(42)	(34)
Accounts payable and other liabilities	(87)	(2)
Deferred revenue	(25)	(22)
Net cash provided by operating activities from continuing operations	385	418
Cash flows from investing activities:
Capital expenditures, including capitalization of software costs	(102)	(102)
Payments for acquisitions of businesses, net of cash acquired		(49)
Other investing activities	4	(4)
Net cash (used in) provided by investing activities from continuing operations	(98)	(155)
Cash flows from financing activities:
Proceeds from long-term debt	156	998
Repayments of long-term debt, including premium and costs	(138)	(757)
Issuance of treasury stock	52	50
Purchases of treasury stock	(396)	(433)
Other financing activities	7	(2)
Net cash used in financing activities from continuing operations	(319)	(144)
Net change in cash and cash equivalents from continuing operations	(32)	119
Net cash flows from discontinued operations	(3)	(7)
Beginning balance	337	563
Ending balance	$ 302	$ 675