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Annual report pursuant to Section 13 and 15(d)

DEBT AND CREDIT FACILITIES (Debt Restructuring) (Details)

v3.8.0.1
DEBT AND CREDIT FACILITIES (Debt Restructuring) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Extinguishment of Debt [Line Items] Ìý Ìý Ìý Ìý Ìý
Debt Instrument, Face Amount Exchanged Ìý Ìý Ìý $ 512.2 Ìý
Gain (loss) on extinguishment/restructuring of debt Ìý $ 174.3 $ (165.4) 166.3 $ 392.9
Debt, carrying value Ìý Ìý Ìý 297.3 Ìý
$544.2 Million 7.75% 2020 Second Lien Notes [Member] Ìý Ìý Ìý Ìý Ìý
Extinguishment of Debt [Line Items] Ìý Ìý Ìý Ìý Ìý
Debt Instrument, Face Amount Exchanged Ìý Ìý Ìý 114.1 Ìý
Debt Instrument, Face Amount Received in Debt Exchange of $544M 7.75% Notes Ìý Ìý Ìý 57.0 Ìý
Gain (loss) on extinguishment/restructuring of debt Ìý Ìý (104.5) 6.9 Ìý
Debt Instrument, Par Value Ìý Ìý Ìý 430.1 Ìý
Debt, carrying value Ìý Ìý Ìý 77.5 Ìý
Five Hundred Million Three Point Nine Five Two Thousand Eighteen Senior Note [Member] Ìý Ìý Ìý Ìý Ìý
Extinguishment of Debt [Line Items] Ìý Ìý Ìý Ìý Ìý
Debt Instrument, Face Amount Exchanged Ìý Ìý Ìý 17.6 Ìý
Debt Instrument, Face Amount Received in Debt Exchange of $500M 3.95% Notes Ìý Ìý Ìý 11.4 Ìý
Gain (loss) on extinguishment/restructuring of debt $ 19.9 Ìý Ìý 1.8 Ìý
Debt, carrying value Ìý Ìý Ìý 15.5 Ìý
Four Hundred Million Five Point Nine Zero Two Thousand And Twenty Senior Note [Member] Ìý Ìý Ìý Ìý Ìý
Extinguishment of Debt [Line Items] Ìý Ìý Ìý Ìý Ìý
Debt Instrument, Face Amount Exchanged Ìý Ìý Ìý 65.1 Ìý
Debt Instrument, Face Amount Received in Debt Exchange of $400M 5.90% Notes Ìý Ìý Ìý 26.0 Ìý
Gain (loss) on extinguishment/restructuring of debt Ìý Ìý (7.8) 28.3 Ìý
Debt Instrument, Par Value 88.9 Ìý 88.9 225.6 Ìý
Debt, carrying value Ìý Ìý Ìý 35.4 Ìý
$500 Million 4.80% 2020 Senior Notes[Member] Ìý Ìý Ìý Ìý Ìý
Extinguishment of Debt [Line Items] Ìý Ìý Ìý Ìý Ìý
Debt Instrument, Face Amount Exchanged Ìý Ìý Ìý 44.7 Ìý
Debt Instrument, Face Amount Received in Debt Exchange of $500M 4.80% Notes Ìý Ìý Ìý 17.9 Ìý
Gain (loss) on extinguishment/restructuring of debt 0.6 Ìý (1.9) 19.5 Ìý
Debt Instrument, Par Value 122.4 Ìý 122.4 236.8 Ìý
Debt, carrying value Ìý Ìý Ìý 24.4 Ìý
$700 Million 4.875% 2021 Senior Notes[Member] Ìý Ìý Ìý Ìý Ìý
Extinguishment of Debt [Line Items] Ìý Ìý Ìý Ìý Ìý
Debt Instrument, Face Amount Exchanged Ìý Ìý Ìý 76.3 Ìý
Debt instrument, Face Amount Received in Debt Exchange of $700M 4.875% Notes Ìý Ìý Ìý 30.5 Ìý
Gain (loss) on extinguishment/restructuring of debt Ìý Ìý (2.8) 33.3 Ìý
Debt Instrument, Par Value 138.4 Ìý 138.4 309.4 Ìý
Debt, carrying value Ìý Ìý Ìý 41.5 Ìý
$800 Million 6.25% 2040 Senior Notes [Member] Ìý Ìý Ìý Ìý Ìý
Extinguishment of Debt [Line Items] Ìý Ìý Ìý Ìý Ìý
Debt Instrument, Face Amount Exchanged Ìý Ìý Ìý 194.4 Ìý
Debt Instrument, Face Amount Received in Debt Exchange of $800M 6.25% Notes Ìý Ìý Ìý 75.7 Ìý
Gain (loss) on extinguishment/restructuring of debt Ìý Ìý Ìý 84.5 Ìý
Debt Instrument, Par Value $ 298.4 Ìý 298.4 298.4 Ìý
Debt, carrying value Ìý Ìý Ìý 103.0 Ìý
$218.5 Million 8.00% 2020 1.5 Lien Notes [Member] Ìý Ìý Ìý Ìý Ìý
Extinguishment of Debt [Line Items] Ìý Ìý Ìý Ìý Ìý
Gain (loss) on extinguishment/restructuring of debt Ìý Ìý $ 45.1 Ìý Ìý
Debt Instrument, Par Value Ìý Ìý Ìý $ 218.5 Ìý