Pension, Profit Sharing & Other Post-Retirement Benefits - Change in Fair Value of Level 3 Plan Assets (Details) (Defined Benefit [Member], Fair Value, Inputs, Level 3 [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of year	$ 5.1
Net appreciation on value of investments	0.9
Purchases of investments	8.4
Balance, end of year	$ 14.4