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Employee Benefit Plans - Assumptions Used in Calculations (Details) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Pension |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate, percent | 4.01% | 4.20% | 3.80%
Rate of compensation, percent | 4.16% | 4.50% | 4.50%
Assumptions used to determine net periodic benefit cost for years ended December 31: |  |  |
Discount rate (pre-spin off), percent | 0.00% | 0.00% | 4.60%
Discount rate (post-spin off), percent | 4.20% | 3.80% | 4.04%
Expected long-term return on plan assets, percent | 7.70% | 7.70% | 8.50%
Rate of compensation increase, percent | 4.16% | 4.50% | 4.50%
Postretirement |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate, percent | 4.12% | 4.34% | 3.96%
Rate of compensation, percent | 4.50% | 4.50% | 4.50%
Assumptions used to determine net periodic benefit cost for years ended December 31: |  |  |
Discount rate (pre-spin off), percent | 0.00% | 0.00% | 4.60%
Discount rate (post-spin off), percent | 4.34% | 3.96% | 4.00%
Expected long-term return on plan assets, percent | 0.00% | 0.00% | 0.00%
Rate of compensation increase, percent | 4.50% | 4.50% | 4.50%

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- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate, Post Spinoff + References No definition available. + Details
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- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate, Prior to Spinoff + References No definition available. + Details
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- Definition The interest rate used to adjust for the time value of money for the plan. + 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 (k)(1) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + 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 (k)(2) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512046 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + 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 (k)(2) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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