Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,403	$ 1,917
Restricted cash	33	41
Accounts receivable, net of allowance for doubtful accounts: 2019 - $37; 2018 - $34	1,539	1,449
Prepaid and other current assets	207	197
Total current assets	3,182	3,604
Property and equipment, net of accumulated depreciation: 2019 - $613; 2018 - $596	268	270
Right of use assets	675	0
Goodwill	3,533	3,535
Other intangible assets, net	1,492	1,524
Other non-current assets	570	525
Total assets	9,720	9,458
Current liabilities:
Accounts payable	217	211
Accrued compensation and contributions to retirement plans	200	354
Income taxes currently payable	134	72
Unearned revenue	1,689	1,641
Other current liabilities	415	351
Total current liabilities	2,655	2,629
Long-term debt	3,663	3,662
Lease liabilities — non-current	617	0
Pension and other postretirement benefits	227	229
Other non-current liabilities	523	634
Total liabilities	7,685	7,154
Redeemable noncontrolling interest (Note 8)	1,647	1,620
Commitments and contingencies (Note 12)
Equity:
Common stock	294	294
Additional paid-in capital	772	833
Retained income	11,532	11,284
Accumulated other comprehensive loss	(633)	(742)
Less: common stock in treasury	(11,638)	(11,041)
Total equity — controlling interests	327	628
Total equity — noncontrolling interests	61	56
Total equity	388	684
Total liabilities and equity	$ 9,720	$ 9,458