Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,881	$ 1,917
Restricted cash	39	41
Accounts receivable, net of allowance for doubtful accounts: 2019 - $38; 2018 - $34	1,543	1,449
Prepaid and other current assets	231	197
Total current assets	3,694	3,604
Property and equipment, net of accumulated depreciation: 2019 - $623; 2018 - $596	280	270
Right of use assets	669	0
Goodwill	3,519	3,535
Other intangible assets, net	1,453	1,524
Other non-current assets	570	525
Total assets	10,185	9,458
Current liabilities:
Accounts payable	214	211
Accrued compensation and contributions to retirement plans	269	354
Income taxes currently payable	88	72
Unearned revenue	1,709	1,641
Other current liabilities	419	351
Total current liabilities	2,699	2,629
Long-term debt	3,664	3,662
Lease liabilities — non-current	621	0
Pension and other postretirement benefits	230	229
Other non-current liabilities	511	634
Total liabilities	7,725	7,154
Redeemable noncontrolling interest (Note 8)	1,890	1,620
Commitments and contingencies (Note 12)
Equity:
Common stock	294	294
Additional paid-in capital	790	833
Retained income	11,710	11,284
Accumulated other comprehensive loss	(651)	(742)
Less: common stock in treasury	(11,631)	(11,041)
Total equity — controlling interests	512	628
Total equity — noncontrolling interests	58	56
Total equity	570	684
Total liabilities and equity	$ 10,185	$ 9,458