APIC Offset To Accumulated Deficit (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Accumulated Other Comprehensive Loss [Line Items]
Reserves to set-off the accumulated deficit	$ 6,199.9

Reduction to additional paid in capital resulting from dividends legally declared or paid in excess of the balance in retained earnings. Such dividends may also be referred to as liquidating distributions or returns of capital.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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=6959260&loc=d3e187085-122770

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