Description of the frequency of periodic payments (monthly, quarterly, annual).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 210
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-Section S99
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-Subparagraph (SX 210.5-02.22)
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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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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No definition available.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Description of debt redemption features under terms of the debt agreement.

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End date of debt instrument redemption period, in CCYY-MM-DD format.

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The excess of the (1) fair value of consideration transferred to the holders of a security in excess of (2) the carrying amount of the security reported on the registrant's balance sheet, which will be deducted from net earnings to derive net earnings available to common shareholders. This amount is generally an adjustment considered in the computation of earnings per share.

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No definition available.

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- Definition

The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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Debt - 5.750% Senior Unsecured Notes Due 2020 - Additional Information (Detail) - 5.750% Senior Unsecured Notes Due 2020 [Member] € in Millions, $ in Millions				12 Months Ended
	Mar. 04, 2017 USD ($)	Mar. 04, 2017 EUR (€)	Oct. 10, 2013 EUR (€)	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Senior unsecured notes, value of offering			€ 200
Senior unsecured notes, interest rate	5.75%	5.75%	5.75%	5.75%	5.75%
Debt instrument, maturity date			Oct. 01, 2020
Senior unsecured notes, payable term				Interest on the notes was payable semi-annually on April 1 and October 1 of each year.
Amount of senior unsecured debt redeemed		€ 200
Senior notes, redemption date	Mar. 04, 2017	Mar. 04, 2017
Senior unsecured notes, redemption description				We redeemed the €200 million aggregate principal amount of our 5.750% Senior Unsecured Notes due 2020 and incurred a redemption premium of approximately $9 million.
Redemption Premium \| $	$ 9