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Employee Benefit Plans Employee Benefit Plans - Various (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Components of net periodic pension expense: |  |  |  |
Interest cost | $ 2.2 |  | $ 2.3 | $ 2.3
Expected return on plan assets | (2.8) |  | (2.8) | (3.2)
Amortization of net loss | 1.2 |  | 1.5 | 1.4
Total net periodic pension expense | 0.6 |  | 1.0 | 0.5
Change in projected benefit obligation: |  |  |  |
Projected benefit obligation at beginning of year | 55.5 |  | 58.3 |
Interest cost | 2.2 |  | 2.3 | 2.3
Defined Benefit Plan, Benefit Obligation, Benefits Paid | (2.3) |  | (3.9) |
Actuarial gains (losses) | 1.6 |  | (1.2) |
Projected benefit obligation at year end | 57.0 |  | 55.5 | 58.3
Change in plan assets: |  |  |  |
Fair value of plan assets at beginning of year | 41.1 |  | 41.0 |
Actual return | 6.7 |  | 3.0 |
Employer contributions | 3.0 |  | 1.0 |
Fair value of plan assets at year end | 48.5 |  | 41.1 | $ 41.0
Funded status (Accrued pension liabilities) (1) | (8.5) | [1] | (14.4) |
Unrecognized actuarial loss recognized in accumulated other comprehensive loss | 13.2 |  | $ 16.7 |
Defined Benefit Plan, Amortization of Net Gains (Losses) | $ 0.9 |  |  |
Assumptions used to determine benefit obligation at year end: |  |  |  |
Discount rate | 3.70% |  | 4.00% | 4.00%
Assumptions used to determine net periodic benefit cost: |  |  |  |
Discount rate | 4.00% |  | 4.00% | 3.80%
Expected long-term weighted-average rate of return on plan assets | 7.00% |  | 7.00% | 7.30%
Expected future benefit payments |  |  |  |
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months | $ 2.6 |  |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Two | 2.8 |  |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Three | 2.9 |  |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Four | 3.0 |  |  |
Defined Benefit Plan, Expected Future Benefit Payment, Year Five | 3.1 |  |  |
In aggregate during five years thereafter | 16.6 |  |  |
Multiemployer Plan, Contributions by Employer | 0.3 |  | $ 0.3 | $ 0.7
Defined contribution expense | 9.7 |  | 10.0 | 10.8
Deferred Compensation Arrangement with Individual, Compensation Expense | 0.5 |  | 0.3 | $ 0.3
Equity Funds [Member] |  |  |  |
Change in plan assets: |  |  |  |
Fair value of plan assets at beginning of year | 28.1 |  |  |
Fair value of plan assets at year end | 33.0 |  | 28.1 |
Fixed Income Funds [Member] |  |  |  |
Change in plan assets: |  |  |  |
Fair value of plan assets at beginning of year | 11.7 |  |  |
Fair value of plan assets at year end | 12.6 |  | 11.7 |
Other Investments [Member] |  |  |  |
Change in plan assets: |  |  |  |
Fair value of plan assets at beginning of year | 1.3 |  |  |
Fair value of plan assets at year end | $ 2.9 |  | $ 1.3 |
Minimum [Member] | Equity Funds [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Target Allocation Percentage | 60.00% |  |  |
Minimum [Member] | Fixed Income Funds [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Target Allocation Percentage | 26.00% |  |  |
Minimum [Member] | Other Investments [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Target Allocation Percentage | 3.00% |  |  |
Maximum [Member] | Equity Funds [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Target Allocation Percentage | 68.00% |  |  |
Maximum [Member] | Fixed Income Funds [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Target Allocation Percentage | 30.00% |  |  |
Maximum [Member] | Other Investments [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Target Allocation Percentage | 6.00% |  |  |
[1] | (1) Accrued pension liabilities on the December 31, 2017 consolidated balance sheet includes $0.9 related to Hudson, which is not included in the table above.

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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + 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 (j) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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