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Employee Benefit Plans (Pension Plans' Range Targets) (Details) | 12 Months Ended
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Dec. 31, 2016
Equity Securities [Member] |
Summary of target allocation percentage of assets |
Target | 42.00%
U.S. Equity [Member] |
Summary of target allocation percentage of assets |
Target | 25.00%
International Equity [Member] |
Summary of target allocation percentage of assets |
Target | 17.00%
Fixed Income, Money Market, Cash and Guaranteed Investment Contracts [Member] |
Summary of target allocation percentage of assets |
Target | 58.00%
Fixed Income [Member] |
Summary of target allocation percentage of assets |
Target | 56.00%
Money Market/Cash/Guaranteed Investments Contracts [Member] |
Summary of target allocation percentage of assets |
Target | 2.00%

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- Definition 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 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920 Reference 2: 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=65897934&loc=d3e1928-114920 + Details
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