Employee Benefit Plans (Change In Benefit Obligation, Change In Plan Assets And Components Of Funded Status) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in plan assets:
Company contributions		$ 50.0
Plan assets — end of year	484.0	472.2
Pension Benefits
Change in benefit obligation:
Projected benefit obligation — beginning of year	537.0	597.2
Service cost	1.6	1.7	1.5
Interest cost	24.9	23.9	27.2
Actuarial loss (gain)	70.9	(35.5)
Benefits paid	(54.8)	(51.5)
Other	(2.8)	1.2
Projected benefit obligation — end of year	576.8	537.0	597.2
Projected salary increases	(3.5)	(2.8)
Accumulated benefit obligation	573.3	534.2
Change in plan assets:
Plan assets — beginning of year	472.2	410.4
Actual return on plan assets	47.8	44.9
Company contributions	20.1	68.0
Plan participants’ contributions	0	0
Benefits paid	(54.8)	(51.5)
Other	(1.3)	0.4
Plan assets — end of year	484.0	472.2	410.4
Unfunded status at end of year	(92.8)	(64.8)
Health Care Benefits
Change in benefit obligation:
Projected benefit obligation — beginning of year	16.4	18.9
Service cost	0	0	0
Interest cost	0.7	0.6	0.8
Actuarial loss (gain)	1.3	(1.0)
Benefits paid	(1.7)	(2.0)
Other	(0.1)	(0.1)
Projected benefit obligation — end of year	16.6	16.4	18.9
Projected salary increases	0	0
Accumulated benefit obligation	16.6	16.4
Change in plan assets:
Plan assets — beginning of year	0	0
Actual return on plan assets	0	0
Company contributions	1.5	1.8
Plan participants’ contributions	0.2	0.2
Benefits paid	(1.7)	(2.0)
Other	0	0
Plan assets — end of year	0	0	0
Unfunded status at end of year	$ (16.6)	$ (16.4)