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Stock-Based Compensation Plans - Fair Value of Liability Cash-Settled Stock Appreciation Rights (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |  |
Balance at January 1 | $ 1.3 | $ 2.2 | $ 0.8
Compensation charge | 0 | 5.8 | 1.4
Cash paid | (1.3) | (6.7) | 0
Balance at December 31 | $ 0 | $ 1.3 | $ 2.2

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- Definition Change in fair value of liability cash-settled stock appreciation rights. + References No definition available. + Details
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- Definition Fair value of liability cash-settled stock appreciation rights. + References No definition available. + Details
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- Definition Liability Cash Settled Stock Appreciation Rights Cash Paid + References No definition available. + Details
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- Details
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