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CONSOLIDATED STATEMENTS OF INCOME - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Revenue:        
Premium revenue $ 7,799 $ 6,583 $ 15,330 $ 12,889
Premium tax revenue 215 185 423 372
Investment income 22 10 33 19
Other revenue 18 22 38 42
Total revenue 8,054 6,800 15,824 13,322
Operating expenses:        
Medical care costs 6,872 5,819 13,435 11,293
General and administrative expenses 551 484 1,122 957
Premium tax expenses 215 185 423 372
Depreciation and amortization 44 31 84 64
Other 11 8 27 28
Total operating expenses 7,693 6,527 15,091 12,714
Operating income 361 273 733 608
Other expenses, net:        
Interest expense 27 30 55 60
Total other expenses, net 27 30 55 60
Income before income tax expense 334 243 678 548
Income tax expense 86 58 172 135
Net income $ 248 $ 185 $ 506 $ 413
Net income per share:        
Net income per share - Basic (in dollars per share) $ 4.29 $ 3.20 $ 8.74 $ 7.14
Net income per share - Diluted (in dollars per share) $ 4.25 $ 3.16 $ 8.63 $ 7.05