Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 320	$ 358
Trade accounts receivable, net	691	661
Deferred income taxes	59	42
Prepaid expenses and other current assets	384	349
Assets of discontinued operations		33
Total current assets	1,454	1,443
Property and equipment, net	255	248
Intangible assets, net	2,209	1,744
Goodwill	5,231	4,705
Other long-term assets	285	357
Total assets	9,434	8,497
Liabilities and Shareholders' Equity
Accounts payable and accrued expenses	761	721
Current maturities of long-term debt	2	2
Deferred revenue	410	379
Liabilities of discontinued operations		3
Total current liabilities	1,173	1,105
Long-term debt	3,951	3,228
Deferred income taxes	694	638
Other long-term liabilities	153	109
Total liabilities	5,971	5,080
Commitments and contingencies
Shareholders' equity:
Preferred stock, no par value: 25.0 million shares authorized; none issued
Common stock, $0.01 par value: 450.0 million shares authorized; 197.9 million shares issued	2	2
Additional paid-in capital	821	804
Accumulated other comprehensive loss	(67)	(60)
Retained earnings	6,218	5,950
Treasury stock, at cost, 66.8 million and 64.5 million shares	(3,511)	(3,279)
Total shareholders' equity	3,463	3,417
Total liabilities and shareholders' equity	$ 9,434	$ 8,497