Reporting And Accounting Policies Equity Based Compensation (Detail) (Stock Compensation Plan, USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Compensation Plan
Incentive Compensation Plans Expense [Line Items]
Pretax expense	$ 51.4	$ 64.9	$ 63.4
Tax benefit	$ 18.0	$ 22.7	$ 22.2

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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