Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Average fixed interest rate related to the group of interest rate derivatives.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (b)
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- Definition

Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
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Fair Value Measurements - Derivatives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivatives Fair Value
Loss to be reclassified during next 12 months	$ 6.7
Interest rate swap
Derivatives Fair Value
Losses (gains) recorded in accumulated other comprehensive loss, net of tax	(3.0)	$ (1.6)	$ 5.0
Derivative liability, fair value	6.9	11.9
Interest rate swap \| Accrued liabilities
Derivatives Fair Value
Derivative liability, fair value	6.7	7.9
Interest rate swap \| Other long-term liabilities
Derivatives Fair Value
Derivative liability, fair value	0.2	4.0
Interest rate swap \| Interest Expense
Derivatives Fair Value
Realized losses recorded in interest expense	$ 8.2	5.2	$ 0.0
LIBOR \| Interest rate swap
Derivatives Fair Value
Derivative interest rate	1.00%
Cash Flow Hedging \| Designated as Hedging Instrument \| Interest rate swap
Derivatives Fair Value
Derivative, average fixed interest rate	2.151%
Notional amounts of the forward contracts	$ 700.0	$ 700.0