Stock Transactions and Stock-Based Compensation (Components Of Share-Based Compensation Program) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pre-tax compensation expense	$ 121.1	$ 117.7	$ 109.9
Income tax benefit	(35.6)	(35.6)	(34.6)
Total stock-based compensation expense, net of income taxes	85.5	82.1	75.3
RSUs and restricted shares:
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pre-tax compensation expense	74.9	69.4	61.1
Income tax benefit	(21.8)	(20.8)	(19.6)
Total stock-based compensation expense, net of income taxes	53.1	48.6	41.5
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pre-tax compensation expense	46.2	48.3	48.8
Income tax benefit	(13.8)	(14.8)	(15.0)
Total stock-based compensation expense, net of income taxes	$ 32.4	$ 33.5	$ 33.8