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Consolidated Statements of Operations - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues:      
Premiums $ 201,478 $ 189,699 $ 178,087
Products 34,145 31,597 29,601
Services 20,016 18,973 17,183
Investment and other income 1,502 1,886 1,376
Total revenues 257,141 242,155 226,247
Operating costs:      
Medical costs 159,396 156,440 145,403
Operating costs 41,704 35,193 34,074
Cost of products sold 30,745 28,117 26,998
Depreciation and amortization 2,891 2,720 2,428
Total operating costs 234,736 222,470 208,903
Earnings from operations 22,405 19,685 17,344
Interest expense (1,663) (1,704) (1,400)
Earnings before income taxes 20,742 17,981 15,944
Provision for income taxes (4,973) (3,742) (3,562)
Net earnings 15,769 14,239 12,382
Earnings attributable to noncontrolling interests (366) (400) (396)
Net earnings attributable to UnitedHealth Group common shareholders $ 15,403 $ 13,839 $ 11,986
Earnings per share attributable to UnitedHealth Group common shareholders:      
Basic $ 16.23 $ 14.55 $ 12.45
Diluted $ 16.03 $ 14.33 $ 12.19
Basic weighted-average number of common shares outstanding 949 951 963
Dilutive effect of common share equivalents 12 15 20
Diluted weighted-average number of common shares outstanding 961 966 983
Anti-dilutive shares excluded from the calculation of dilutive effect of common share equivalents 8 10 6