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Financing Activities - Equity Securities (Details) - USD ($) $ in Billions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Feb. 28, 2018
Other Liabilities Disclosure [Abstract] |  |
Common Stock Aggregate Sales Price |  | $ 1.0
Maximum Percentage Paid To Selling Agents | 2.00% |
Common stock issued | 0 |

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