Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended	0 Months Ended	1 Months Ended
Dec. 31, 2013 Venezuela	Dec. 31, 2012 Venezuela	Feb. 25, 2014 Subsequent events	Feb. 28, 2014 Subsequent events Venezuela
Subsequent events
Installment payments, including an annual charge, received from sale of expropriated assets	$ 69.3	$ 16.8		$ 17.8
Dividend declared per common stock (in dollars per share)			$ 0.15
Annualized dividend rate per common stock (in dollars per share)			$ 0.60

Aggregate dividends declared during the period for each share of common stock outstanding.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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