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v3.4.0.3

Investments in Unconsolidated Entities (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Equity method investments, combined income statements |  |
Revenues | $ 1,682 | $ 1,730
Operating expenses | 1,230 | 1,287
Operating income | 452 | 443
Other income (expense), net | (4) | 5
Net income | $ 448 | $ 448

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