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INVESTMENTS IN UNCONSOLIDATED SUBSIDIARIES AND AFFILIATES (Tables) | 6 Months Ended
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Jun. 30, 2019
Equity Method Investments and Joint Ventures [Abstract] |
Summary of Investments in Unconsolidated Subsidiaries and Affiliates | A summary of investments in unconsolidated subsidiaries and affiliates as of June 30, 2019 and December 31, 2018 is as follows:
| June 30, 2019 |  | December 31, 2018
| (in millions)
Equity method | $ | 520 |  |  | $ | 523 |
Cost method | 3 |  |  | 3 |
Total | $ | 523 |  |  | $ | 526 |

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