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Income Taxes Components of Income Tax Provision (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Current tax provision	$ 460.2	$ 424.8	$ 440.2
Deferred tax expense (benefit)	94.4	(9.4)	31.3
Total income tax provision	$ 554.6	$ 415.4	$ 471.5

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.