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Debt (Narrative) (Details) (USD $)
1 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2013
Jun. 28, 2013
Debentures
7.00% Debenture
Jun. 28, 2013
Debentures
8.00% Debenture
Jun. 28, 2013
Debentures
9.50% Debenture
Mar. 31, 2013
Line of Credt
Jun. 28, 2013
Line of Credt
Jun. 28, 2013
Senior Notes
Apr. 30, 2013
Senior Notes
3.50% Senior Note
Apr. 30, 2013
Senior Notes
4.75% Senior Note
Jun. 28, 2013
Line of Credt
LIBOR
Mar. 31, 2013
Letter of Credit
Line of Credt
Debt Instrument [Line Items]                      
Face amount               $ 300,000,000 $ 600,000,000    
Facility fees for letters of credit           0.25%          
Borrowings, outstanding           0          
Letters of credit outstanding           0.0          
Term of debt instrument         5 years   10 years        
Variable interest rate                   1.50%  
Stated interest rate   7.00% 8.00% 9.50%       3.50% 4.75%    
Maximum borrowing capacity         250,000,000           150,000,000
Aggregate net proceeds $ 889,300,000