Employee and Retiree Benefit Plans (Weighted Average Asset Allocation for Company's Funded Pension Benefit Plans) (Details)	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	64.40%	66.60%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	34.00%	32.50%
Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	1.60%	0.90%