Annual report pursuant to Section 13 and 15(d)

Segment Information (Details)

v3.19.3.a.u2
Segment Information (Details)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
segment
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Segment Reporting [Abstract]                      
Number of operating segments | segment                 2    
Revenues $ 18,863 $ 18,976 $ 18,356 $ 18,444 $ 16,559 $ 16,182 $ 14,181 $ 13,194 $ 74,639 $ 60,116 $ 48,382
Earnings from operations                 1,781 1,458 1,199
Total assets 40,994       30,901       40,994 30,901 21,855
Managed Care                      
Revenues                 71,379 57,099 45,798
Earnings from operations                 1,806 1,310 917
Total assets 37,689       27,627       37,689 27,627 19,959
Specialty Services                      
Revenues                 13,781 12,506 2,584
Earnings from operations                 (25) 148 282
Total assets $ 3,305       $ 3,274       3,305 3,274 1,896
Operating Segments | Managed Care                      
Revenues                 71,209 56,999 45,842
Operating Segments | Specialty Services                      
Revenues                 3,430 3,117 12,055
Intersegment Eliminations                      
Revenues                 (10,521) (9,489) (9,515)
Intersegment Eliminations | Managed Care                      
Revenues                 170 100 44
Intersegment Eliminations | Specialty Services                      
Revenues                 $ 10,351 $ 9,389 $ 9,471