Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and equivalents	$ 1,900	$ 760
Accounts receivable, net of allowance for doubtful accounts: 2013 - $50; 2012 - $54	957	954
Deferred income taxes	131	117
Prepaid and other current assets	119	128
Assets held for sale	0	1,940
Total current assets	3,107	3,899
Property and equipment, net of accumulated depreciation: 2013 - $636; 2012 - $772	340	368
Goodwill	1,432	1,438
Other intangible assets, net	1,037	1,081
Other non-current assets	244	266
Total assets	6,160	7,052
Current liabilities:
Accounts payable	227	249
Accrued compensation and contributions to retirement plans	310	453
Short-term debt	0	457
Income taxes currently payable	177	158
Unearned revenue	1,284	1,229
Other current liabilities	397	457
Liabilities held for sale	0	664
Total current liabilities	2,395	3,667
Long-term debt	799	799
Pension and other postretirement benefits	511	529
Other non-current liabilities	374	407
Total liabilities	4,079	5,402
Commitments and contingencies (Note 11)
Redeemable noncontrolling interest (Note 7)	810	810
Equity:
Common stock	412	412
Additional paid-in capital	342	492
Retained income	7,348	6,525
Accumulated other comprehensive loss	(501)	(517)
Less: common stock in treasury	(6,378)	(6,145)
Total equity - controlling interests	1,223	767
Total equity - noncontrolling interests	48	73
Total equity	1,271	840
Total liabilities and equity	$ 6,160	$ 7,052