Annual report pursuant to Section 13 and 15(d)

DEBT AND CREDIT FACILITIES (Schedule Of Long-Term Debt) (Details)

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DEBT AND CREDIT FACILITIES (Schedule Of Long-Term Debt) (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Total Face Amount $ 4,814,800,000 $ 5,497,100,000
Long-term Debt 3,043,500,000 4,054,800,000
Current portion of long-term debt 20,900,000 94,100,000
Long-term debt noncurrent portion 3,022,600,000 3,960,700,000
Term Loan - $1.25 Billion [Member]
    
Debt Instrument [Line Items]    
Extinguishment of Debt, Amount 847,100,000  
Type   Variable
Final Maturity   2016
Total Face Amount   847,100,000
Long-term Debt   847,100,000 [1]
Total amounts paid down on original loan   402,800,000
Term Loan Original Amount 0 1,250,000,000.00
Current portion of long-term debt   94,100,000
Imputed interest rate   1.83%
Seven Hundred Million Four Point Eight Seven Five Two Thousand Twenty-one Senior Note [Member]
    
Debt Instrument [Line Items]    
Stated interest rate 4.875% 4.875%
Type Fixed Fixed
Final Maturity 2021 2021
Total Face Amount 700,000,000 700,000,000
Long-term Debt 699,400,000 [2] 699,400,000 [2]
Debt Instrument, Unamortized Discount 600,000 600,000
Imputed interest rate 4.88% 4.88%
$500 million 4.80% 2020 Senior Notes [Member]
    
Debt Instrument [Line Items]    
Stated interest rate 4.80% 4.80%
Type Fixed Fixed
Final Maturity 2020 2020
Total Face Amount 500,000,000 500,000,000
Long-term Debt 499,200,000 [3] 499,200,000 [3]
Debt Instrument, Unamortized Discount 800,000 800,000
Imputed interest rate 4.83% 4.80%
Discount Rate Used to Calculate Present Values of Remaining Scheduled Payments of Principal and Interest on Notes to Be Redeemed, Variable Rate Basis treasury rate  
Discount Rate Used to Calculate Present Values of Remaining Scheduled Payments of Principal and Interest on Notes to Be Redeemed, Spread on Rate Basis 0.35%  
$800 Million 6.25% 2040 Senior Notes [Member]
    
Debt Instrument [Line Items]    
Stated interest rate 6.25% 6.25%
Type Fixed Fixed
Final Maturity 2040 2040
Total Face Amount 800,000,000 800,000,000
Long-term Debt 790,400,000 [4] 790,200,000 [4]
Debt Instrument, Unamortized Discount 9,600,000 9,800,000
Imputed interest rate 6.34% 6.25%
$400 Million 5.90% 2020 Senior Notes [Member]
    
Debt Instrument [Line Items]    
Stated interest rate 5.90% 5.90%
Type Fixed Fixed
Final Maturity 2020 2020
Total Face Amount 400,000,000 400,000,000
Long-term Debt 398,400,000 [5] 398,200,000 [5]
Debt Instrument, Unamortized Discount 1,600,000 1,800,000
Imputed interest rate 5.98% 5.90%
$500 Million 3.95% 2018 Senior Notes [Member]
    
Debt Instrument [Line Items]    
Stated interest rate 3.95% 3.95%
Type Fixed Fixed
Final Maturity 2018 2018
Total Face Amount 500,000,000.0 500,000,000.0
Long-term Debt 496,500,000 [6] 495,700,000 [6]
Debt Instrument, Unamortized Discount 3,500,000 4,300,000
Imputed interest rate 4.14% 4.14%
Revolving Credit Facility [Member]
    
Debt Instrument [Line Items]    
Type Variable Variable
Final Maturity 2017 2017
Total Face Amount 1,750,000,000.00 1,750,000,000.00
Credit facility, amount outstanding 0 [7] 325,000,000 [7]
Imputed interest rate 1.64% 2.02%
Credit facility remaining capacity 1,700,000,000 1,400,000,000
Letter of Credit [Member]
    
Debt Instrument [Line Items]    
Credit facility, amount outstanding 8,400,000 27,700,000
Equipment Loans [Member]
    
Debt Instrument [Line Items]    
Type Fixed  
Final Maturity 2020  
Total Face Amount 164,800,000  
Long-term Debt 161,700,000  
Interest Rate Swap [Member]
    
Debt Instrument [Line Items]    
Fair Value Adjustment to Interest Rate Hedge (2,100,000)  
Senior Notes Five Hundred Million [Member]
    
Debt Instrument [Line Items]    
Discount Rate Used to Calculate Present Values of Remaining Scheduled Payments of Principal and Interest on Notes to Be Redeemed, Variable Rate Basis treasury rate  
Discount Rate Used to Calculate Present Values of Remaining Scheduled Payments of Principal and Interest on Notes to Be Redeemed, Spread on Rate Basis 0.50%  
Senior Notes10 Year Tranche [Member]
    
Debt Instrument [Line Items]    
Discount Rate Used to Calculate Present Values of Remaining Scheduled Payments of Principal and Interest on Notes to Be Redeemed, Variable Rate Basis treasury rate  
Discount Rate Used to Calculate Present Values of Remaining Scheduled Payments of Principal and Interest on Notes to Be Redeemed, Spread on Rate Basis 0.25%  
Senior Notes30 Year Tranche [Member]
    
Debt Instrument [Line Items]    
Total Face Amount 300,000,000  
Discount Rate Used to Calculate Present Values of Remaining Scheduled Payments of Principal and Interest on Notes to Be Redeemed, Variable Rate Basis treasury rate  
Discount Rate Used to Calculate Present Values of Remaining Scheduled Payments of Principal and Interest on Notes to Be Redeemed, Spread on Rate Basis 0.40%  
Five Hundred Million Six Point Two Five Percent Two Thousand And Forty [Member]
    
Debt Instrument [Line Items]    
Total Face Amount $ 500,000,000  
Discount Rate Used to Calculate Present Values of Remaining Scheduled Payments of Principal and Interest on Notes to Be Redeemed, Variable Rate Basis treasury rate  
Discount Rate Used to Calculate Present Values of Remaining Scheduled Payments of Principal and Interest on Notes to Be Redeemed, Spread on Rate Basis 0.40%  
[1] During the first quarter of 2013, the term loan was repaid in full through repayments totaling $847.1 million. As of December 31, 2012, $402.8 million had been paid on the original $1.25 billion term loan and, of the amount remaining under the term loan, $94.1 million was classified as Current portion of debt. The current classification was based upon the principal payment terms of the arrangement requiring principal payments on each three-month anniversary following the funding of the term loan.
[2] As of December 31, 2013 and December 31, 2012, the $700 million 4.875 percent senior notes were recorded at a par value of $700 million less unamortized discounts of $0.6 million for each period, based on an imputed interest rate of 4.88 percent.
[3] As of December 31, 2013 and December 31, 2012, the $500 million 4.80 percent senior notes were recorded at a par value of $500 million less unamortized discounts of $0.8 million for each period, based on an imputed interest rate of 4.83 percent.
[4] As of December 31, 2013 and December 31, 2012, the $800 million 6.25 percent senior notes were recorded at par value of $800 million less unamortized discounts of $9.6 million and $9.8 million, respectively, based on an imputed interest rate of 6.34 percent.
[5] As of December 31, 2013 and December 31, 2012, the $400 million 5.90 percent senior notes were recorded at a par value of $400 million less unamortized discounts of $1.6 million and $1.8 million, respectively, based on an imputed interest rate of 5.98 percent.
[6] As of December 31, 2013 and December 31, 2012, the $500 million 3.95 percent senior notes were recorded at a par value of $500 million less unamortized discounts of $3.5 million and $4.3 million, respectively, based on an imputed interest rate of 4.14 percent.
[7] As of December 31, 2013, no revolving loans were drawn under the credit facility. As of December 31, 2012, $325.0 million of revolving loans were drawn under the credit facility. As of December 31, 2013 and December 31, 2012, the principal amount of letter of credit obligations totaled $8.4 million and $27.7 million, respectively, thereby reducing available borrowing capacity to $1.7 billion and $1.4 billion for each period, resp