Year ended Dec. 31
| ($ millions) | 2011 | 2010 | 2009 |
| Revenues | 2,663 | 2,673 | 2,770 |
| Net earnings applicable to common shares | 290 | 255 |
181 |
| Comparable earnings | |||
| Comparable EBITDA | 1,079 | 955 | 888 |
| Funds from operations | 809 | 805 | 580 |
| Cash flow from operations | 694 | 838 | 729 |
| Free cash flow (deficiency) | 181 | 172 | (117) |
| Ratios | |||
| Cash flow to interest (times) | 4.4 | 4.6 | 4.9 |
| Cash flow to debt (%) | 20.2 | 19.6 | 20.5 |
| Debt to invested capital (%) | 52.4 | 53.1 | 56.1 |
| Per common share data ($) | |||
| Earnings from continuing operations | 1.31 | 1.16 | 0.90 |
| Comparable Earnings | 1.04 | 0.97 | 0.90 |
| Dividends | 1.16 | 1.16 | 1.16 |