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Debt - Debt Issuance Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Oct. 28, 2015
Debt Instrument [Line Items]
Deferred debt issuance costs	$ 7.0	$ 8.7	$ 7.4
Expected Future Amortization Expense [Abstract]
2017	1.7
2018	1.7
2019	1.7
2020	1.4
2021	0.3
Thereafter	0.2
Total	7.0	8.7	$ 7.4
Interest Expense [Member]
Debt Instrument [Line Items]
Amortization expense	$ 1.7	$ 0.9

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- Definition

Deferred Debt Issuance Costs, Expected Future Amortization Expense After Year Five

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- Definition

Deferred Debt Issuance Costs, Expected Future Amortization Expense in Next Twelve Months

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- Definition

Deferred Debt Issuance Costs, Expected Future Amortization Expense in Year Four

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- Definition

Deferred Debt Issuance Costs, Expected Future Amortization Expense in Year Three

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- Definition

Deferred Debt Issuance Costs, Expected Future Amortization Expense in Year Two

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- Definition

Amount of amortization expense attributable to debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(8))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(8))
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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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-Name Accounting Standards Codification
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