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Schedule I - Condensed Financial Information - Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Current Assets |  |  |
Cash and temporary cash investments | $ 1,272 | $ 981 |
Accounts receivable - customers, less allowance for uncollectible accounts | 1,701 | 1,236 |
Taxes receivable | 26 | 20 |
Prepayments | 271 | 260 |
Other current assets | 231 | 200 |
TOTAL CURRENT ASSETS | 5,301 | 4,272 |
Investments in subsidiaries and others | 1,816 | 2,065 |
Goodwill | 446 | 446 |
Other noncurrent assets | 9,223 | 7,853 |
TOTAL ASSETS | 62,895 | 58,079 | $ 53,920
Current Liabilities |  |  |
Long-term debt due within one year |  | 1,446 |
Term Loan | 165 | 0 |
Notes payable | 1,705 | 1,692 |
Accounts payable | 1,475 | 1,164 |
Accrued taxes | 150 | 76 |
Other current liabilities | 426 | 371 |
TOTAL CURRENT LIABILITIES | 7,354 | 6,287 |
Long-term debt | 20,382 | 18,527 |
Shareholders’ Equity |  |  |
Equity | 18,847 | 18,022 |
TOTAL LIABILITIES AND EQUITY | 62,895 | 58,079 |
Parent Company |  |  |
Current Assets |  |  |
Cash and temporary cash investments | 144 | 2 |
Accounts receivable - customers, less allowance for uncollectible accounts | 1 |  |
Taxes receivable | 18 | 18 |
Term loan receivable from affiliated companies | 0 | 0 |
Accounts receivable from affiliated companies | 1,256 | 870 |
Prepayments | 62 | 32 |
Other current assets | 12 | 12 |
TOTAL CURRENT ASSETS | 1,493 | 934 |
Investments in subsidiaries and others | 18,670 | 18,009 |
Goodwill | 406 | 406 |
Deferred income tax | 55 | 14 |
Long-term debt receivable from affiliated companies | 875 | 1,275 |
Other noncurrent assets | 0 | 0 |
TOTAL ASSETS | 21,499 | 20,638 |
Current Liabilities |  |  |
Long-term debt due within one year | 1,178 | 3 |
Term Loan | 0 | 0 |
Notes payable | 0 | 537 |
Accounts payable | 0 | 0 |
Accounts payable to affiliated companies | 517 | 595 |
Accrued taxes | 6 | 2 |
Other current liabilities | 12 | 10 |
TOTAL CURRENT LIABILITIES | 1,713 | 1,147 |
Deferred income tax | 0 | 0 |
Total Liabilities | 1,713 | 1,147 |
Long-term debt | 939 | 1,469 |
Shareholders’ Equity |  |  |
Common stock, including additional paid-in capital | 8,844 | 8,089 |
Retained earnings | 10,003 | 9,933 |
Equity | 18,847 | 18,022 |
TOTAL LIABILITIES AND EQUITY | $ 21,499 | $ 20,638 |

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