Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and equivalents	$ 1,577	$ 760
Accounts receivable, net of allowance for doubtful accounts: 2013 - $49; 2012 - $54	957	954
Deferred income taxes	130	117
Prepaid and other current assets	164	128
Assets held for sale	0	1,940
Total current assets	2,828	3,899
Property and equipment, net of accumulated depreciation: 2013 - $646; 2012 - $772	336	368
Goodwill	1,406	1,438
Other intangible assets, net	1,023	1,081
Other non-current assets	255	266
Total assets	5,848	7,052
Current liabilities:
Accounts payable	227	249
Accrued compensation and contributions to retirement plans	349	453
Short-term debt	0	457
Income taxes currently payable	113	158
Unearned revenue	1,240	1,229
Other current liabilities	430	457
Liabilities held for sale	0	664
Total current liabilities	2,359	3,667
Long-term debt	799	799
Pension and other post-retirement benefits	506	529
Other non-current liabilities	359	407
Total liabilities	4,023	5,402
Commitments and contingencies (Note 11)
Redeemable noncontrolling interest (Note 7)	810	810
Equity:
Common stock	412	412
Additional paid-in capital	427	492
Retained income	7,289	6,525
Accumulated other comprehensive loss	(465)	(517)
Less: common stock in treasury	(6,686)	(6,145)
Total equity — controlling interests	977	767
Total equity — noncontrolling interests	38	73
Total equity	1,015	840
Total liabilities and equity	$ 5,848	$ 7,052