Schedule of Share Based Compensation Stock Options (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic Value of Stock Options Exercised	$ 20.9	$ 14.5	$ 37.2	$ 25.9
Stock Compensation Expense Related to Stock Option Awards	9.7	9.8	11.8	11.4
Issued Stock Options	1.1	1.6	1.1	1.6
Weighted Average Fair Value of Stock Options issued (per share)	$ 12.84	$ 10.90	$ 12.84	$ 10.90
Fair Value of Stock Options Issued	$ 14.6	$ 17.3	$ 14.6	$ 17.3