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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Net earnings $ 20,639 $ 17,732 $ 15,769
Other comprehensive loss:      
Gross unrealized (losses) gains on investment securities during the period (4,292) (1,028) 1,058
Income tax effect 984 248 (253)
Total unrealized (losses) gains, net of tax (3,308) (780) 805
Gross reclassification adjustment for net realized losses (gains) included in net earnings 139 (173) (75)
Income tax effect (32) 40 17
Total reclassification adjustment, net of tax 107 (133) (58)
Total foreign currency translation gains (losses) 192 (657) (983)
Other comprehensive loss (3,009) (1,570) (236)
Comprehensive income 17,630 16,162 15,533
Comprehensive income attributable to noncontrolling interests (519) (447) (366)
Comprehensive income attributable to UnitedHealth Group common shareholders $ 17,111 $ 15,715 $ 15,167