Debt (Schedule of Redemption Price) (Details) - Senior Notes - Senior Notes Due 2023	Apr. 14, 2015
2018
Debt Instrument, Redemption [Line Items]
Redemption Price	105.156%
2019
Debt Instrument, Redemption [Line Items]
Redemption Price	103.438%
2020
Debt Instrument, Redemption [Line Items]
Redemption Price	101.719%
2021 and thereafter
Debt Instrument, Redemption [Line Items]
Redemption Price	100.00%

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph e

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration