Quarterly report pursuant to Section 13 or 15(d)

DEBT (Debt Outstanding - Additional Information) (Details)

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DEBT (Debt Outstanding - Additional Information) (Details) - USD ($)
6 Months Ended 12 Months Ended
May 12, 2016
Jun. 30, 2016
Dec. 31, 2015
Debt Instrument [Line Items]      
Debt, long term   $ 2,960,000,000 $ 1,196,800,000
Notes, 6.30%, due July 2017      
Debt Instrument [Line Items]      
Debt, interest rate   6.30% 6.30%
Debt, maturity date   2017-07 2017-07
Debt, long term   $ 272,500,000 $ 272,500,000
Notes, 2.30%, due June 2021      
Debt Instrument [Line Items]      
Debt instrument, term 5 years    
Debt, interest rate 2.30% 2.30% 2.30%
Debt, maturity date   2021-06 2021-06
Debt, long term $ 500,000,000 $ 500,000,000 $ 0
Notes, 3.30%, due Dec. 2022      
Debt Instrument [Line Items]      
Debt, interest rate   3.30% 3.30%
Debt, maturity date   2022-12 2022-12
Debt, long term   $ 500,000,000 $ 500,000,000
Notes, 3.25%, due June 2026      
Debt Instrument [Line Items]      
Debt instrument, term 10 years    
Debt, interest rate 3.25% 3.25% 3.25%
Debt, maturity date   2026-06 2026-06
Debt, long term $ 275,000,000 $ 275,000,000 $ 0
Debentures, 6.90%, due July 2028      
Debt Instrument [Line Items]      
Debt, interest rate   6.90% 6.90%
Debt, maturity date   2028-07 2028-07
Debt, long term   $ 125,000,000 $ 125,000,000
Notes, 7.00%, due July 2037      
Debt Instrument [Line Items]      
Debt, interest rate   7.00% 7.00%
Debt, maturity date   2037-07 2037-07
Debt, long term   $ 250,000,000 $ 250,000,000
Revolving Credit Facility      
Debt Instrument [Line Items]      
Debt instrument, term   5 years