Stock-Based Incentive Compensation Plans (Details)	3 Months Ended
	Mar. 31, 2013
Stock options [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	1,019,968
Performance Shares [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	260,114
Stock Appreciation Rights [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	112,990
Restricted Stock Units [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	550,164
Non-employee Agent Stock Options [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	82,075
Non-employee Director Stock Options [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	58,720
Non-employee Director Restricted Stock Units [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Shares granted	10,104