Share-Based Compensation (Share-Based Compensation Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share based compensation expense	$ 13.1	$ 15.5	$ 53.9	$ 58.1
Tax benefit	(5.0)	(5.9)	(20.6)	(22.2)
After-tax expense	8.1	9.6	33.3	35.9
Stock Options [Member]
Share based compensation expense	3.3	4.3	13.3	17.5
Restricted Stock Units (RSUs) [Member]
Share based compensation expense	5.0	5.5	20.1	21.9
Performance Shares [Member]
Share based compensation expense	4.9	4.5	19.3	15.8
Deferred Compensation [Member]
Share based compensation expense	0.3	0.3	1.3	1.2
Other share based compensation [Member]
Share based compensation expense	(0.4)	0.9	(0.1)	1.7
Segment, Continuing Operations [Member]
After-tax expense	8.1	8.5
Discontinued Operations [Member]
After-tax expense	$ 0	$ 1.1	$ 0	$ 3.5