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Employee Benefit Plans and Other Postretirement Plans - Schedule of Weighted-Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Company contributions | $ 57,100,000 | $ 57,100,000 | $ 400,000
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost, Expected return on plan assets | 6.55% |  |
Weighted-Average expected return on plan assets for 2016 | 6.55% |  |
Pension Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Company contributions | $ 58,200,000 | $ 1,200,000 |
Weighted-Average Assumptions Used to Determine Benefit Obligation, Discount Rate | 4.24% | 4.51% | 4.14%
Weighted-Average Assumptions Used to Determine Benefit Obligations, Rate of compensation increase | 4.00% | 4.00% | 4.00%
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost, Discount rate | 4.49% | 4.14% | 5.00%
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost, Expected return on plan assets | 6.57% | 6.73% | 6.69%
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost, Rate of compensation increase | 4.00% | 4.00% | 4.00%
Discount rate to calculate net periodic benefit cost for 2016 | 4.49% | 4.14% | 5.00%
Weighted-Average expected return on plan assets for 2016 | 6.57% | 6.73% | 6.69%
Postretirement Plans |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |
Company contributions | $ 1,400,000 | $ 2,000,000 |
Weighted-Average Assumptions Used to Determine Benefit Obligation, Discount Rate | 3.91% | 4.35% | 3.95%
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost, Discount rate | 4.17% | 3.95% | 4.85%
Discount rate to calculate net periodic benefit cost for 2016 | 4.17% | 3.95% | 4.85%

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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=65897934&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=65897934&loc=d3e1928-114920 + Details
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- Definition The interest rate used to adjust for the time value of money. + 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=65897934&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=65897934&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=65897934&loc=d3e1928-114920 + Details
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- Definition Amount of contributions made by the employer to defined benefit 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 (d)(5)(ii) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 35 -Paragraph 123 -Subparagraph B -URI http://asc.fasb.org/extlink&oid=64937487&loc=d3e36068-114959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 63 -Subparagraph B -URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12551-114930 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(iv)(01) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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