Employee Benefit Plans and Other Postretirement Benefits - Schedule of Estimated Benefit Payments (Details) $ in Millions	Dec. 31, 2017 USD ($)
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
2018	$ 45.4
2019	49.3
2020	53.2
2021	57.0
2022 - 2025	407.9
Postretirement Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
2018	1.0
2019	1.0
2020	1.0
2021	0.9
2022 - 2025	$ 5.4

Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

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