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Pension and Savings Plans Estimated Future Benefit Payments (Details) - Successor - Pension Plan $ in Millions	Dec. 31, 2018 USD ($)
Estimated Future Benefit Payments
2019	$ 56.8
2020	58.4
2021	59.4
2022	58.9
2023	58.2
Years 2024-2028	$ 274.5

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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-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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-Publisher FASB
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Amount of benefits for defined benefit plan expected to be paid in fifth 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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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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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