Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 2,158	$ 2,777
Restricted cash	45	2
Accounts receivable, net of allowance for doubtful accounts: 2018 - $35; 2017 - $33	1,237	1,319
Prepaid and other current assets	188	226
Total current assets	3,628	4,324
Property and equipment, net of accumulated depreciation: 2018 - $586; 2017 - $554	275	275
Goodwill	3,544	2,989
Other intangible assets, net	1,420	1,388
Other non-current assets	516	449
Total assets	9,383	9,425
Current liabilities:
Accounts payable	194	195
Accrued compensation and contributions to retirement plans	307	472
Short-term debt	0	399
Income taxes currently payable	92	77
Unearned revenue	1,576	1,613
Accrued legal and regulatory settlements	0	107
Other current liabilities	348	351
Total current liabilities	2,517	3,214
Long-term debt	3,661	3,170
Pension and other postretirement benefits	225	244
Other non-current liabilities	537	679
Total liabilities	6,940	7,307
Redeemable noncontrolling interest (Note 8)	1,485	1,350
Commitments and contingencies (Note 12)
Equity:
Common stock	412	412
Additional paid-in capital	897	525
Retained income	11,003	10,025
Accumulated other comprehensive loss	(703)	(649)
Less: common stock in treasury	(10,704)	(9,602)
Total equity — controlling interests	905	711
Total equity — noncontrolling interests	53	57
Total equity	958	768
Total liabilities and equity	$ 9,383	$ 9,425