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CONSOLIDATED STATEMENTS OF INCOME - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Revenue:    
Premium revenue $ 7,885 $ 7,531
Premium tax revenue 172 208
Investment income 71 11
Other revenue 21 20
Total revenue 8,149 7,770
Operating expenses:    
Medical care costs 6,871 6,563
General and administrative expenses 591 571
Premium tax expenses 172 208
Depreciation and amortization 44 40
Other 16 16
Total operating expenses 7,694 7,398
Operating income 455 372
Other expenses, net:    
Interest expense 28 28
Total other expenses, net 28 28
Income before income tax expense 427 344
Income tax expense 106 86
Net income $ 321 $ 258
Net income per share:    
Net income per share - Basic (in dollars per share) $ 5.58 $ 4.45
Net income per share - Diluted (in dollars per share) $ 5.52 $ 4.39