The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Subsequent Events Subsequent events (Details) (USD $) In Millions, except Share data, unless otherwise specified					3 Months Ended
	Jan. 23, 2014 2014 Omnibus Plan [Member] Subsequent Event [Member]	Dec. 31, 2013 Common Class A [Member]	Dec. 31, 2012 Common Class A [Member]	Jan. 23, 2014 Common Class A [Member] 2014 Omnibus Plan [Member] Subsequent Event [Member]	Mar. 28, 2014 UNITED STATES Subsequent Event [Member]
Subsequent Event [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	1,800,000
Common Stock, Par or Stated Value Per Share		$ 1	$ 1	$ 1.00
Potential sale of assets					$ 4.0