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Reconciliation of United States Federal Statutory Tax Rate to Effective Tax Rate on Income Before Provision for Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation Of Statutory Federal Tax Rate [Line Items]
U.S. statutory tax rate	35.00%	35.00%	35.00%
State and local taxes, net of federal tax benefit	290.00%	240.00%	270.00%
Benefit of foreign operations	(640.00%)	(610.00%)	(630.00%)
Legacy tax items	(60.00%)	(40.00%)	(20.00%)
Other	(70.00%)	80.00%	0.00%
Effective tax rate	30.20%	31.70%	31.20%
Income tax paid	$ 335.7	$ 293.3	$ 191.4

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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