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Asset Securitizations (Tables) | 12 Months Ended
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Dec. 31, 2017
Table Text Block [Abstract] |
Restricted cash held by trusts | The following table provides information on the restricted cash held by the Lending Trust and the Charge Trust as of December 31, 2017 and 2016, included in Other assets on the Consolidated Balance Sheets:
(Millions) |  | 2017 |  | 2016
Lending Trust |  | $ | 55 |  | $ | 35
Charge Trust |  |  | 7 |  |  | 3
Total |  | $ | 62 |  | $ | 38

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