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Income Taxes Income Tax Refunds, Net (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Apr. 01, 2017	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2016
Successor
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net		$ (0.8)	$ (64.0)
Successor | U.S. — federal
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net		(11.2)	(103.1)
Successor | U.S. — state and local
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net		0.0	(1.6)
Successor | Non-U.S.
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net		$ 10.4	$ 40.7
Predecessor
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net	$ 5.5			$ (40.1)
Predecessor | U.S. — federal
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net	0.0			(56.5)
Predecessor | U.S. — state and local
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net	0.0			1.4
Predecessor | Non-U.S.
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net	$ 5.5			$ 15.0

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- Definition

[Line Items] for Income Tax Refunds, Net [Table]

+ References

No definition available.

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- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586

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