Share-Based Compensation (Share-Based Compensation Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share based compensation expense	$ 14.5	$ 19.6	$ 40.8	$ 42.6
Tax benefit	(5.5)	(7.5)	(15.6)	(16.3)
After-tax expense	9.0	12.1	25.2	26.3
Stock Options [Member]
Share based compensation expense	3.5	5.3	10.0	13.2
Restricted Stock Units (RSUs) [Member]
Share based compensation expense	4.9	(6.3)	15.1	16.4
Performance Shares [Member]
Share based compensation expense	4.8	7.4	14.4	11.3
Deferred Compensation [Member]
Share based compensation expense	0.6	(0.5)	1.0	0.9
Other share based compensation [Member]
Share based compensation expense	(0.7)	(0.1)	0.3	0.8
Segment, Continuing Operations [Member]
After-tax expense	9.0	10.8
Discontinued Operations [Member]
After-tax expense	$ 0	$ 1.3