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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Operating activities:    
Net income $ 258 $ 228
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 40 33
Deferred income taxes 16 6
Share-based compensation 34 24
Other, net (8) 12
Changes in operating assets and liabilities:    
Receivables 21 (98)
Prepaid expenses and other current assets (32) (15)
Medical claims and benefits payable 263 168
Amounts due government agencies 137 432
Accounts payable, accrued liabilities and other (81) 16
Deferred revenue (352) (304)
Income taxes 67 66
Net cash provided by operating activities 363 568
Investing activities:    
Purchases of investments (403) (388)
Proceeds from sales and maturities of investments 513 308
Purchases of property, equipment and capitalized software (23) (16)
Other, net (13) 9
Net cash provided by (used in) investing activities 74 (87)
Financing activities:    
Common stock withheld to settle employee tax obligations (52) (51)
Contingent consideration liabilities settled (20) (20)
Common stock purchases 0 (128)
Other, net (5) (8)
Net cash used in financing activities (77) (207)
Net increase in cash, cash equivalents, and restricted cash and cash equivalents 360 274
Cash, cash equivalents, and restricted cash and cash equivalents at beginning of period 4,506 4,223
Cash, cash equivalents, and restricted cash and cash equivalents at end of period $ 4,866 $ 4,497