Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan employer contribution			$ 55.3
Defined contribution plan expense	$ 14.1	$ 12.0	$ 41.3	$ 37.6