Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 5,741	$ 4,937
Fixed maturity securities, current (amortized cost of $22,222 and $19,021; allowance for credit losses of $7 and $0)	23,433	19,676
Equity securities, current	1,559	1,009
Premium receivables	5,279	5,014
Self-funded receivables	2,849	2,570
Other receivables	2,830	2,807
Other current assets	4,060	3,020
Total current assets	45,751	39,033
Fixed maturity securities (amortized cost of $532 and $487; allowance for credit losses of $0 and $0)	562	505
Other invested assets, long-term	4,285	4,258
Property and equipment, net	3,483	3,133
Goodwill	21,691	20,500
Other intangible assets	9,405	8,674
Other noncurrent assets	1,438	1,350
Total assets	86,615	77,453
Liabilities and shareholders' equity
Medical claims payable	11,359	8,842
Other policyholder liabilities	4,590	3,050
Unearned income	1,259	1,017
Accounts payable and accrued expenses	5,493	4,198
Short-term borrowings	0	700
Current portion of long-term debt	700	1,598
Other current liabilities	6,052	4,127
Total current liabilities	29,453	23,532
Long-term debt, less current portion	19,335	17,787
Reserves for future policy benefits, noncurrent	794	759
Deferred tax liabilities, net	2,019	2,227
Other noncurrent liabilities	1,815	1,420
Total liabilities	53,416	45,725
Commitments and contingencies—Note 14
Shareholders' equity
Preferred stock, without par value, shares authorized - 100,000,000; shares issued and outstanding - none	0	0
Common stock, par value $0.01, shares authorized - 900,000,000; shares issued and outstanding - 245,401,430 and 252,922,161	3	3
Additional paid-in capital	9,244	9,448
Retained earnings	23,802	22,573
Accumulated other comprehensive income (loss)	150	(296)
Total shareholders' equity	33,199	31,728
Total liabilities and shareholders' equity	$ 86,615	$ 77,453