Intangible Assets from Acquisitions (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2012
|
Dec. 31, 2011
|
---|---|---|
Acquired Finite-Lived Intangible Assets [Line Items] | ||
Original cost and accumulated amortization of fully amortized intangible assets | $ 82.1 | $ 42.6 |