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Capital Structure Financial Policies - (Tables) | 12 Months Ended
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Dec. 31, 2018
CAPITAL STRUCTURE FINANCIAL POLICIES |
Schedule of components of ratios |
($ millions) |  | Capital Measure Target |  | December 31, 2018 |  | December 31, 2017 |
Components of ratios |  |  |  |  |  |  |
| Short-term debt |  |  |  | 3 231 |  | 2 136 |
| Current portion of long-term debt |  |  |  | 229 |  | 71 |
| Long-term debt |  |  |  | 13 890 |  | 13 372 |
|  | Total debt |  |  |  | 17 350 |  | 15 579 |
| Less: Cash and cash equivalents |  |  |  | 2 221 |  | 2 672 |
|  | Net debt |  |  |  | 15 129 |  | 12 907 |
| Shareholders' equity |  |  |  | 44 005 |  | 45 383 |
| Total capitalization (total debt plus shareholders' equity) |  |  |  | 61 355 |  | 60 962 |
| Funds from operations(1) |  |  |  | 10 172 |  | 9 139 |
Net debt to funds from operations |  | <3.0 times |  | 1.5 |  | 1.4 |
Total debt to total debt plus shareholders' equity |  |  |  | 28% |  | 26% |
(1) Funds from operations is calculated as cash flow from operating activities before changes in non-cash working capital, and is a non-GAAP financial measure.

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