Capital Stock - Options outstanding and exercisable (Details) (USD $) | 9 Months Ended |
In Millions, except Share data, unless otherwise specified | Sep. 30, 2013 |
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 |
2003 – expire in 2013 | ' |
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 2013 | ' |
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 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 |
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) | $9 |
Range of Exercise Prices, Upper Range Limit (USD per share) | $10 |
2008 – expire in 2016 | ' |
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 10 months 16 days |
Options on Shares Outstanding | 3,942,757 |
Options on Shares Exercisable | 3,942,757 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $9.46 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $9.46 |
Options Outstanding, Aggregate Intrinsic Value | $35 |
Options Exercisable, Aggregate Intrinsic Value | 35 |
Stock Options | 2003 – expire in 2013 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '1 month 18 days |
Options on Shares Outstanding | 1,969 |
Options on Shares Exercisable | 1,969 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $9.90 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $9.90 |
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 0 days |
Options on Shares Outstanding | 256,187 |
Options on Shares Exercisable | 256,187 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $10.57 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $10.57 |
Options Outstanding, Aggregate Intrinsic Value | 2 |
Options Exercisable, Aggregate Intrinsic Value | 2 |
Stock Options | 2005 – expire in 2013 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '1 year 4 months 12 days |
Options on Shares Outstanding | 54,129 |
Options on Shares Exercisable | 54,129 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $10.77 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $10.77 |
Options Outstanding, Aggregate Intrinsic Value | 0.4 |
Options Exercisable, Aggregate Intrinsic Value | 0.4 |
Stock Options | 2006 – expire in 2014 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '5 months 22 days |
Options on Shares Outstanding | 280,894 |
Options on Shares Exercisable | 280,894 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $10.34 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $10.34 |
Options Outstanding, Aggregate Intrinsic Value | 2.2 |
Options Exercisable, Aggregate Intrinsic Value | 2.2 |
Stock Options | 2007 – expire in 2015 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '1 year 4 months 27 days |
Options on Shares Outstanding | 1,164,836 |
Options on Shares Exercisable | 1,164,836 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $10.36 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $10.36 |
Options Outstanding, Aggregate Intrinsic Value | 9.3 |
Options Exercisable, Aggregate Intrinsic Value | 9.3 |
Stock Options | 2008 – expire in 2016 | ' |
Information about options outstanding and options exercisable by year of grant | ' |
Average Remaining Term | '2 years 6 months 0 days |
Options on Shares Outstanding | 2,184,742 |
Options on Shares Exercisable | 2,184,742 |
Options Outstanding, Weighted Average Exercise Price (USD per share) | $8.71 |
Options Exercisable, Weighted Average Exercise Price (USD per share) | $8.71 |
Options Outstanding, Aggregate Intrinsic Value | 21.1 |
Options Exercisable, Aggregate Intrinsic Value | $21.10 |