(Loss) Earning Per Share - Additional Information (Detail) shares in Millions	Jun. 30, 2013 shares
Earnings Per Share [Abstract]
Common stock distributed to former parent stockholders	579
Common stock shares outstanding	579

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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

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