INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2015

INCOME TAXES

Schedule of income tax expense on income from continuing operations

	Years Ended December 31,
	2015		2014		2013
Current:
Federal	$	22.6	$	45.5	$	(24.3	)
State	2.9		3.7		(1.0		)
Total	25.5		49.2		(25.3		)
Deferred:	49.3		2.7		57.5
Total income tax expense	$	74.8	$	51.9	$	32.2

Schedule of effective income tax rate

	Years Ended December 31,
	2015		2014		2013
Computed federal income tax expense	35.0	%	35.0	%	35.0	%
State income tax	2.5	%	2.2	%	2.9	%
Valuation allowance	1.1	%	3.3	%	—
Foreign taxes	0.6	%	0.4	%	—
Deferred tax adjustment	1.1	%	(0.9	)%	—
Unrecognized tax benefits	0.4	%	(0.4	)%	(2.1	)%
Other — net	1.4	%	2.7	%	1.7	%
Effective income tax rate	42.1	%	42.3	%	37.5	%

Schedule of tax effects of temporary differences

	As of December 31,
	2015			2014
Deferred tax assets:
Benefit plans	$	79.1		$	63.6
Federal net operating losses	68.0			—
Insurance reserves	15.4			11.4
State net operating losses	7.8			—
Foreign losses	5.7			4.1
Alternative minimum tax credits	3.6			1.5
Allowance for doubtful accounts	2.4			1.4
Other	1.9			0.8
Total deferred tax assets	183.9			82.8
Valuation allowance	(12.6		)	(4.1		)
Total Deferred tax assets, net of valuation allowance	171.3			78.7
Deferred tax liabilities:
Basis differences for property and equipment	300.8			252.7
Capital Construction Fund	95.6			106.9
Intangibles	53.0			3.8
Deferred revenue	11.8			10.1
Joint ventures and other investments	10.6			7.7
Reserves	10.0			(2.1		)
Total deferred tax liabilities	481.8			379.1
Deferred tax liability, net	$	310.5		$	300.4

Reconciliation of unrecognized tax benefits

Unrecognized Tax Benefits:	Amount
Balance at December 31, 2012	$	8.3
Additions for tax positions of prior years	2.0
Reductions for lapse of statute of limitations	(3.1		)
Balance at December 31, 2013	7.2
Additions for tax positions of prior years	0.5
Reductions for lapse of statute of limitations	(1.0		)
Balance at December 31, 2014	6.7
Additions for tax positions of prior years	1.5
Additions from unrecognized tax benefits acquired	14.4
Reductions for lapse of statute of limitations	(0.5		)
Balance at December 31, 2015	$	22.1