Capital Stock - Options outstanding and exercisable (Details) (USD $) | 9 Months Ended |
In Millions, except Share data, unless otherwise specified | Sep. 30, 2014 |
Information about options outstanding and options exercisable by year of grant | ' |
Range of Exercise Prices, Lower Range Limit (USD per share) | $7 |
Range of Exercise Prices, Upper Range Limit (USD per share) | $11 |
Options Granted, Range One [Member] | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Range of Exercise Prices, Lower Range Limit (USD per share) | $10 |
Range of Exercise Prices, Upper Range Limit (USD per share) | $10 |
2004 – expire in 2014 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Range of Exercise Prices, Lower Range Limit (USD per share) | $10 |
Range of Exercise Prices, Upper Range Limit (USD per share) | $11 |
2005 – expire in 2015 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Range of Exercise Prices, Lower Range Limit (USD per share) | $10 |
Range of Exercise Prices, Upper Range Limit (USD per share) | $11 |
2006 – expire in 2016 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Range of Exercise Prices, Lower Range Limit (USD per share) | $9 |
Range of Exercise Prices, Upper Range Limit (USD per share) | $10 |
2007 – expire in 2015 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Range of Exercise Prices, Lower Range Limit (USD per share) | $7 |
Range of Exercise Prices, Upper Range Limit (USD per share) | $10 |
Stock Options | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '1 year 3 months 15 days |
Options on Shares Outstanding | 2,055,210 |
Options on Shares Exercisable | 2,055,210 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $9.07 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $9.07 |
Options Outstanding, Aggregate Intrinsic Value | $14.90 |
Options Exercisable, Aggregate Intrinsic Value | 14.9 |
Stock Options | Options Granted, Range One [Member] | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '2 months 5 days |
Options on Shares Outstanding | 3,794 |
Options on Shares Exercisable | 3,794 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $9.78 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $9.78 |
Options Outstanding, Aggregate Intrinsic Value | 0 |
Options Exercisable, Aggregate Intrinsic Value | 0 |
Stock Options | 2004 – expire in 2014 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '6 months 14 days |
Options on Shares Outstanding | 43,188 |
Options on Shares Exercisable | 43,188 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $10.90 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $10.90 |
Options Outstanding, Aggregate Intrinsic Value | 0.3 |
Options Exercisable, Aggregate Intrinsic Value | 0.3 |
Stock Options | 2005 – expire in 2015 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '1 year 7 months 27 days |
Options on Shares Outstanding | 47,737 |
Options on Shares Exercisable | 47,737 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $10.03 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $10.03 |
Options Outstanding, Aggregate Intrinsic Value | 0.3 |
Options Exercisable, Aggregate Intrinsic Value | 0.3 |
Stock Options | 2006 – expire in 2016 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '5 months 2 days |
Options on Shares Outstanding | 349,497 |
Options on Shares Exercisable | 349,497 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $10.27 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $10.27 |
Options Outstanding, Aggregate Intrinsic Value | 2.1 |
Options Exercisable, Aggregate Intrinsic Value | 2.1 |
Stock Options | 2007 – expire in 2015 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '1 year 6 months 0 days |
Options on Shares Outstanding | 1,610,994 |
Options on Shares Exercisable | 1,610,994 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $8.73 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $8.73 |
Options Outstanding, Aggregate Intrinsic Value | 12.2 |
Options Exercisable, Aggregate Intrinsic Value | $12.20 |