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Significant Financing Transactions (Schedule of Equity Units) (Details) - USD ($) shares in Millions, $ in Millions |  | 1 Months Ended |
--- | --- | --- | ---
Jun. 14, 2019 | Aug. 31, 2019 | Sep. 30, 2019
Capital Unit [Line Items] |  |  |  |
Units Issued |  |  | 18.5 |
Total Preferred Stock | [1] |  |  | $ 1,596
Stock Purchase Contract Liability |  |  |  | 233
2019 Corporate Units |  |  |  |
Capital Unit [Line Items] |  |  |  |
Units Issued |  | 16.0 |  |
Total Net Proceeds | [2] | $ 1,582 |  |
Total Preferred Stock |  | $ 1,610 |  |
Cumulative Dividend Rate |  | 1.75% |  |
Stock Purchase Contract Annual Rate |  | 5.50% |  |
Stock Purchase Contract Liability | [3] |  |  | $ 250
Stock Purchase Contract Settlement Date |  | Jun. 01, 2022 |  |
[1] | 20 million shares authorized; 2 million shares outstanding at September 30, 2019.
[2] | Issuance costs of $28 million were recorded as a reduction to preferred stock ($14 million) and common stock ($14 million) in the Consolidated Balance Sheets.
[3] | Payments of $17 million were made in September 2019. The stock purchase contract liability was $233 million at September 30, 2019.

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