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Stock-Based Compensation - Summary of Incentive Equity Awards (Parenthetical) (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Intrinsic values of stock options exercised $ 4.0
Outstanding "in the money" stock options using current period closing stock price $ 31.75
Shares, outstanding 8.3
Outstanding "in the money" stock options aggregate intrinsic value 99.3
Stock options outstanding, weighted-average remaining contractual life 5 years 3 months 18 days
Stock options exercisable 8.3
Time-Based Restricted Stock Units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share price $ 31.75
Shares 1.8
Aggregate intrinsic value 58.2
Performance-Based Restricted Stock Units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Intrinsic values of Performance-based restricted stock units 0.1
Share price $ 31.75
Shares 0.6
Aggregate intrinsic value $ 19.7