Stock Transactions (Components Of Share-Based Compensation Program) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stock Transactions [Abstract]
Pre-tax compensation expense, Restricted stock units and restricted shares	$ 47,900,000	$ 32,200,000	$ 29,100,000
Tax benefit, Restricted stock units and restricted shares	(17,800,000)	(12,000,000)	(10,800,000)
Restricted stock unit and restricted share expense, net of tax benefit	30,100,000	20,200,000	18,300,000
Pre-tax compensation expense, Stock options	47,700,000	55,900,000	58,200,000
Tax benefit, Stock options	(14,600,000)	(16,500,000)	(18,000,000)
Stock option expense, net of tax benefit	33,100,000	39,400,000	40,200,000
Pre-tax compensation expense	95,603,000	88,122,000	87,350,000
Tax benefit	(32,400,000)	(28,500,000)	(28,800,000)
Total share-based compensation expense, net of tax benefit	$ 63,200,000	$ 59,600,000	$ 58,500,000