Share-Based Compensation And Capital Stock Unrecognized Compensation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense on Unvested Awards	$ 20.1
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense on Unvested Awards	2.8
Weighted Average Amortization Period	2 years 3 months 18 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense on Unvested Awards	13.3
Weighted Average Amortization Period	2 years 6 months
Performance Vested Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense on Unvested Awards	$ 4.0
Weighted Average Amortization Period	2 years 10 months 24 days