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Employee Benefit Plans Investments in nonqualified plans (Details 13) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
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Nonqualified Defined Benefit and Contribution Plan Investments [Line Items] |  |
Investments in nonqualified benefit plans | $ 105.2 | $ 101.4
Equity securities [Member] |  |
Nonqualified Defined Benefit and Contribution Plan Investments [Line Items] |  |
Investments in nonqualified benefit plans | 54.2 | 54.9
Life insurance carried on plan participants [Member] |  |
Nonqualified Defined Benefit and Contribution Plan Investments [Line Items] |  |
Investments in nonqualified benefit plans | 34.3 | 32.8
Other investments [Member] |  |
Nonqualified Defined Benefit and Contribution Plan Investments [Line Items] |  |
Investments in nonqualified benefit plans | $ 16.7 | $ 13.7

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- Definition Investments in nonqualified benefit plans + References No definition available. + Details
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- Definition Nonqualified defined benefit and contribution plans. + References No definition available. + Details
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- Details
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- Details
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- Details
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