Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 4,500	$ 4,108
Restricted cash	18	14
Accounts receivable, net of allowance for doubtful accounts: 2021 - $33; 2020 - $30	1,509	1,593
Prepaid and other current assets	279	273
Total current assets	6,306	5,988
Property and equipment, net of accumulated depreciation: 2021 - $599; 2020 - $587	281	284
Right of use assets	479	494
Goodwill	3,713	3,735
Other intangible assets, net	1,332	1,352
Other non-current assets	719	684
Total assets	12,830	12,537
Current liabilities:
Accounts payable	241	233
Accrued compensation and contributions to retirement plans	261	551
Income taxes currently payable	238	84
Unearned revenue	2,111	2,168
Other current liabilities	552	551
Total current liabilities	3,403	3,587
Long-term debt	4,111	4,110
Lease liabilities — non-current	525	544
Pension and other postretirement benefits	287	291
Other non-current liabilities	598	653
Total liabilities	8,924	9,185
Redeemable noncontrolling interest (Note 8)	2,808	2,781
Commitments and contingencies (Note 12)
Equity:
Common stock	294	294
Additional paid-in capital	935	946
Retained income	13,920	13,367
Accumulated other comprehensive loss	(648)	(637)
Less: common stock in treasury	(13,469)	(13,461)
Total equity — controlling interests	1,032	509
Total equity — noncontrolling interests	66	62
Total equity	1,098	571
Total liabilities and equity	$ 12,830	$ 12,537