Employee Benefit Plans (Asset Strategy Allocation) (Details)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Target Plan Asset Allocations	100.00%	100.00%
Domestic Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Range, Total Equity, Maximum	40.00%
Target Allocation Range, Total Equity, Minimum	20.00%
Defined Benefit Plan Target Plan Asset Allocations	34.00%	33.00%
International Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Range, Total Equity, Maximum	25.00%
Target Allocation Range, Total Equity, Minimum	10.00%
Defined Benefit Plan Target Plan Asset Allocations	23.00%	23.00%
Private Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Range, Total Equity, Maximum	15.00%
Target Allocation Range, Total Equity, Minimum	0.00%
Defined Benefit Plan Target Plan Asset Allocations	6.00%	4.00%
Domestic Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Range, Total Equity, Maximum	40.00%
Target Allocation Range, Total Equity, Minimum	10.00%
Defined Benefit Plan Target Plan Asset Allocations	17.00%	21.00%
High Yield Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Range, Total Equity, Maximum	25.00%
Target Allocation Range, Total Equity, Minimum	0.00%
Defined Benefit Plan Target Plan Asset Allocations	13.00%	13.00%
Total Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Range, Total Equity, Maximum	70.00%
Target Allocation Range, Total Equity, Minimum	40.00%
Defined Benefit Plan Target Plan Asset Allocations	63.00%	60.00%
Total Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Range, Total Equity, Maximum	65.00%
Target Allocation Range, Total Equity, Minimum	10.00%
Defined Benefit Plan Target Plan Asset Allocations	30.00%	34.00%
Real Estate
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Range, Total Equity, Maximum	15.00%
Target Allocation Range, Total Equity, Minimum	0.00%
Defined Benefit Plan Target Plan Asset Allocations	5.00%	5.00%
Other
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Range, Total Equity, Maximum	5.00%
Target Allocation Range, Total Equity, Minimum	0.00%
Defined Benefit Plan Target Plan Asset Allocations	2.00%	1.00%

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Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(i)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)(i)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

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Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

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