Other Post Retirement Employee Benefit Plans (Funded Status Of The Domestic Plans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Change in plan assets:
Fair value of plan assets	$ 2,555.4	$ 2,378.3
Other Post-Retirement Benefits
Change in benefit obligation:
Benefit obligation at beginning of year	264.8	123.7
Service cost	1.9	1.6
Interest cost	11.0	9.5
Amendments, curtailments and other	(0.8)	2.0
Actuarial (gain) loss	(11.7)	16.0
Acquisitions	4.6	125.1
Retiree contributions	8.6	6.6
Benefits paid	(22.0)	(19.7)
Benefit obligation at end of year	256.4	264.8
Change in plan assets:
Fair value of plan assets	0	0
Funded status/accrued benefit cost	256.4	264.8
Funded status/accrued benefit cost – continuing operations	(256.4)	(262.3)
Attributable To Discontinued Operations | Other Post-Retirement Benefits
Change in plan assets:
Funded status/accrued benefit cost – continuing operations	$ 0	$ 2.5