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Global Health Care Medical Costs Payable - Activity (Details) (Accident and health insurance [Member], USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended |
|---|---|---|
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Mar. 31, 2015
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Dec. 31, 2014
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Accident and health insurance [Member]
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| Medical Claims Payable Activity [Abstract] | ||
| Costs payable, beginning balance, gross | $ 2,180 | $ 2,050 |
| Less: Reinsurance and other amounts recoverable | 252 | 194 |
| Balance at January 1, net | 1,928 | 1,856 |
| Incurred claims related to: | ||
| Current year | 4,713 | 16,853 |
| Prior years | (109) | (159) |
| Total incurred | 4,604 | 16,694 |
| Paid claims related to: | ||
| Current year | 3,025 | 14,966 |
| Prior years | 1,343 | 1,656 |
| Total paid | 4,368 | 16,622 |
| Ending balance, net | 2,164 | 1,928 |
| Add: Reinsurance and other amounts recoverable | 244 | 252 |
| Costs payable, ending balance, gross | $ 2,408 | $ 2,180 |