Affordable Care Act (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Dec. 31, 2016 |
|
| Affordable Care Act [Abstract] | |||
| Risk adjustment and reinsurance, pre-tax benefit, period increase (decrease) | $ 48 | $ 70 | |
| Risk adjustment | (866) | $ (425) | |
| Reinsurance | 90 | 122 | |
| Risk corridor | (7) | (3) | |
| Minimum MLR | (27) | (18) | |
| Cost sharing reductions | $ (280) | $ (147) | |
| X | ||||||||||
- Definition Affordable Care Act [Abstract] No definition available.
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| X | ||||||||||
- Definition Affordable Care Act Cost Sharing Reductions No definition available.
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| X | ||||||||||
- Definition Affordable Care Act Minimum Medical Loss Ratio No definition available.
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| X | ||||||||||
- Definition Affordable Care Act Reinsurance No definition available.
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| X | ||||||||||
- Definition Affordable Care Act Risk Adjustment No definition available.
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| X | ||||||||||
- Definition Affordable Care Act Risk Adjustment and Reinsurance, Pre-Tax Benefit, Period Increase (Decrease) No definition available.
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| X | ||||||||||
- Definition Affordable Care Act Risk Corridor No definition available.
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