Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 5,213	$ 4,108
Restricted cash	8	14
Accounts receivable, net of allowance for doubtful accounts: 2021 - $32; 2020 - $30	1,421	1,593
Prepaid and other current assets	290	273
Total current assets	6,932	5,988
Property and equipment, net of accumulated depreciation: 2021 - $615; 2020 - $587	268	284
Right of use assets	446	494
Goodwill	3,719	3,735
Other intangible assets, net	1,311	1,352
Other non-current assets	722	684
Total assets	13,398	12,537
Current liabilities:
Accounts payable	210	233
Accrued compensation and contributions to retirement plans	338	551
Income taxes currently payable	168	84
Unearned revenue	2,099	2,168
Other current liabilities	500	551
Total current liabilities	3,315	3,587
Long-term debt	4,112	4,110
Lease liabilities — non-current	496	544
Pension and other postretirement benefits	290	291
Other non-current liabilities	749	653
Total liabilities	8,962	9,185
Redeemable noncontrolling interest (Note 8)	3,105	2,781
Commitments and contingencies (Note 12)
Equity:
Common stock	294	294
Additional paid-in capital	963	946
Retained income	14,237	13,367
Accumulated other comprehensive loss	(764)	(637)
Less: common stock in treasury	(13,465)	(13,461)
Total equity — controlling interests	1,265	509
Total equity — noncontrolling interests	66	62
Total equity	1,331	571
Total liabilities and equity	$ 13,398	$ 12,537