FAIR VALUE MEASUREMENTS OF ASSETS AND LIABILITIES - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2009
Fair Value Disclosures [Line Items]
Implied fair value, Goodwill	$ 41.0	$ 41.0	$ 137.0	$ 341.0
Non-cash Goodwill impairment charges	96.0	96.0	204.0
Impairment charges in Special items related to indefinite lived intangible assets.		11.6
U.S. Spine Reporting Unit [Member]
Fair Value Disclosures [Line Items]
Implied fair value, Goodwill	41.0	41.0	137.0
Non-cash Goodwill impairment charges		$ 96.0

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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+ Details