Condensed Consolidated Statement Of Changes In Shareholders' Equity - USD ($) $ in Millions |
Total |
Share Capital [Member] |
Paid In Surplus [Member] |
Accumulated Deficit [Member] |
Accumulated Other Comprehensive Income [Member] |
|---|---|---|---|---|---|
| Balance, Beginning of Year at Dec. 31, 2016 | $ 6,126.0 | $ 4,756.0 | $ 1,358.0 | $ (1,198.0) | $ 1,210.0 |
| Net Earnings (Loss) | 762.0 | 762.0 | |||
| Dividends on Common Shares | (29.0) | (29.0) | |||
| Other Comprehensive Income (Loss) | (76.0) | (76.0) | |||
| Balance, End of Period at Jun. 30, 2017 | 6,783.0 | 4,756.0 | 1,358.0 | (465.0) | 1,134.0 |
| Balance, Beginning of Year at Dec. 31, 2016 | 6,126.0 | 4,756.0 | 1,358.0 | (1,198.0) | 1,210.0 |
| Common Shares Issued Under Dividend Reinvestment Plan | 0.6 | ||||
| Balance, End of Period at Dec. 31, 2017 | 6,728.0 | 4,757.0 | 1,358.0 | (429.0) | 1,042.0 |
| Dividends on Common Shares | (29.0) | (29.0) | |||
| Common Shares Purchased under Normal Course Issuer Bid | (200.0) | (83.0) | (117.0) | ||
| Common Shares Issued Under Dividend Reinvestment Plan | 0.4 | ||||
| Other Comprehensive Income (Loss) | (2.0) | (2.0) | |||
| Balance, End of Period at Jun. 30, 2018 | $ 6,497.0 | $ 4,674.0 | $ 1,358.0 | $ (575.0) | $ 1,040.0 |
| X | ||||||||||
- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount after tax of other comprehensive income (loss) attributable to parent entity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Value of stock issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|