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Annual report pursuant to Section 13 and 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Target Allocation and Actual Asset Allocations for Pension and VEBA Plan Assets) (Details)

betfred sportsbook review	12 Months Ended
betfred sportsbook review	Dec. 31, 2015	Dec. 31, 2014
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	100.00%	100.00%
Defined Benefit Plan, Target Plan Asset Allocations	100.00%
Pension Benefits [Member] \| Equity Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	44.00%	45.60%
Defined Benefit Plan, Target Plan Asset Allocations	45.00%
Pension Benefits [Member] \| Fixed Income Investments [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	27.70%	28.70%
Defined Benefit Plan, Target Plan Asset Allocations	28.00%
Pension Benefits [Member] \| Hedge Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	5.80%	5.50%
Defined Benefit Plan, Target Plan Asset Allocations	5.00%
Pension Benefits [Member] \| Private Equity Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	4.70%	4.20%
Defined Benefit Plan, Target Plan Asset Allocations	7.00%
Pension Benefits [Member] \| Structured Finance [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	8.90%	8.70%
Defined Benefit Plan, Target Plan Asset Allocations	7.50%
Pension Benefits [Member] \| Real Estate [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	8.20%	6.70%
Defined Benefit Plan, Target Plan Asset Allocations	7.50%
Pension Benefits [Member] \| Cash [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	0.70%	0.60%
Defined Benefit Plan, Target Plan Asset Allocations	0.00%
Veba Trust [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	100.00%	100.00%
Defined Benefit Plan, Target Plan Asset Allocations	100.00%
Veba Trust [Member] \| Equity Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	8.80%	8.60%
Defined Benefit Plan, Target Plan Asset Allocations	8.00%
Veba Trust [Member] \| Fixed Income Investments [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	78.20%	79.30%
Defined Benefit Plan, Target Plan Asset Allocations	80.10%
Veba Trust [Member] \| Hedge Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	4.50%	4.30%
Defined Benefit Plan, Target Plan Asset Allocations	4.20%
Veba Trust [Member] \| Private Equity Funds [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	2.20%	2.30%
Defined Benefit Plan, Target Plan Asset Allocations	2.60%
Veba Trust [Member] \| Structured Finance [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	2.30%	2.30%
Defined Benefit Plan, Target Plan Asset Allocations	2.10%
Veba Trust [Member] \| Real Estate [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	4.00%	3.20%
Defined Benefit Plan, Target Plan Asset Allocations	3.00%
Veba Trust [Member] \| Cash [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted-average asset allocation	0.00%	0.00%
Defined Benefit Plan, Target Plan Asset Allocations	0.00%