v3.8.0.1

Investments (Equity Method Investments, Statement of Operations) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Investments [Abstract] |  |  |
Total revenue | $ 6,392 | $ 5,360 | $ 4,356
Total expenses | (2,300) | (1,995) | (1,803)
Net earnings (losses) | 4,092 | 3,365 | 2,553
Equity in net earnings (losses) included above | 409 | 247 | 216
Equity in net earnings (losses) of limited partnership interests not included above | 123 | 103 | 32
Total equity in net earnings (losses) | $ 532 | $ 350 | $ 248

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