Annual report pursuant to Section 13 and 15(d)

Affordable Care Act (Details)

v3.19.3.a.u2
Affordable Care Act (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Dec. 31, 2019
Affordable Care Act [Abstract]      
Risk adjustment and reinsurance, pre-tax benefit, period increase (decrease) $ 131 $ 238  
Risk adjustment receivable   91 $ 245
Risk adjustment payable   (1,019) (1,239)
Minimum medical loss ratio   (265) (367)
Cost sharing reduction receivable   57 73
Cost sharing reduction payable   $ (107) $ (1)