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Long-Term Debt (Narrative) (Details) (USD $)
12 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended
May 25, 2014
Senior Notes
Adjustment
May 25, 2014
Senior Notes
Maximum
May 25, 2014
6.200% senior notes due October 2017
May 25, 2014
6.800% senior notes due October 2037
Senior Notes
May 25, 2014
Revolving Credit Agreement
Commercial Paper
Oct. 24, 2013
Revolving Credit Agreement
Revolving Credit Facility
Oct. 23, 2013
Revolving Credit Agreement
Revolving Credit Facility
May 25, 2014
Revolving Credit Agreement
Revolving Credit Facility
May 25, 2014
4.500% senior notes due October 2021
Senior Notes
May 25, 2014
6.200% senior notes due October 2017
Senior Notes
May 25, 2014
Libor
Revolving Credit Agreement
Revolving Credit Facility
May 25, 2014
Base Rate Loans
Revolving Credit Agreement
Revolving Credit Facility
May 25, 2014
Revolving Credit Facility
Eurodollar
Revolving Credit Agreement
Aug. 24, 2014
Long-term Debt
Scenario, Forecast
Aug. 24, 2014
Long-term Debt
Scenario, Forecast
7.125% debentures due February 2016
Jul. 01, 2014
Senior Notes
Subsequent Event
Jun. 30, 2014
Senior Notes
Subsequent Event
Jun. 30, 2014
Senior Notes
Subsequent Event
4.500% senior notes due October 2021
Jun. 30, 2014
Senior Notes
Subsequent Event
3.350% senior notes due November 2022
Jun. 30, 2014
Senior Notes
Subsequent Event
6.000% senior notes due August 2035
Jun. 30, 2014
Senior Notes
Subsequent Event
6.200% senior notes due October 2017
Jun. 30, 2014
Senior Notes
Subsequent Event
3.790% senior notes due August 2019
Jun. 30, 2014
Senior Notes
Subsequent Event
3.790% senior notes due August 2019
Jun. 30, 2014
Senior Notes
Subsequent Event
4.520% senior notes due August 2024
Jun. 30, 2014
Senior Notes
Subsequent Event
4.520% senior notes due August 2024
Debt Instruments [Line Items]                                                  
Maximum borrowing available under the credit facility               $ 750,000,000.0                                  
Total debt to total capitalization ratio               0.75                                  
Expiration date of credit facility           Oct. 24, 2018 Oct. 03, 2016                                    
Base interest rate percentage of revolving credit facility in addition to federal funds rate (percentage)               0.50%                                  
Debt instrument, basis spread on variable rate                         1.00%                        
Applicable interest rate assuming a BBB equivalent credit rating level (percentage)                     1.30% 0.30%                          
Amount outstanding under credit facility         207,600,000     0                                  
Remaining credit available               542,400,000                                  
Face amount of debt       300,000,000.0         400,000,000 500,000,000.0                              
Interest rate of debt (percentage)     6.20% 6.80%         4.50% 6.20%         7.125%     4.50% 3.35% 6.00% 6.20%   3.79%   4.52%
Maturity date of debt     Oct. 31, 2017 Oct. 01, 2037         Oct. 01, 2021 Oct. 01, 2017                              
Maximum range of interest rate adjustment on funds borrowed (percentage)   2.00%                                              
Adjustments made to interest rates on funds borrowed 0                                                
Extinguishment of Debt, Amount                           $ 1,000,000,000 $ 100,000,000.0 $ 610,000,000.0 $ 600,000,000.0         $ 80,000,000   $ 210,000,000