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Employees' Stock Incentive Plans and Management Incentive Plans (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 07, 2013
Jul. 28, 2013
Jun. 07, 2013
Selling, General and Administrative Expenses
Stock Option and Restricted Stock Plans
Jul. 29, 2012
Selling, General and Administrative Expenses
Stock Option and Restricted Stock Plans
Jul. 28, 2013
Selling, General and Administrative Expenses
Stock Option and Restricted Stock Plans
Jun. 07, 2013
Selling, General and Administrative Expenses
LTPP
Jul. 29, 2012
Selling, General and Administrative Expenses
LTPP
Jul. 28, 2013
Selling, General and Administrative Expenses
LTPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Right to receive cash, amount $ 72.50              
Accelerated vesting expense of stock based awards $ 24.3              
Employees Stock Incentive Plans And Management Incentive Plans (Textuals) [Abstract]                
Pre-tax compensation cost     26.1 6.9 1.9 3.8 8.7 0
Tax benefit     7.9 2.1 0.7 1.3 3.0 0
After-tax compensation cost     $ 18.2 $ 4.8 $ 1.2 $ 2.5 $ 5.7 $ 0
Performance Period In Years For Dividends Paid   2 years