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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2014
INCOME TAXES. |
Schedule of income tax expense on income from continuing operations |
|  | Years Ended December 31, |
|  | 2014 |  | 2013 |  | 2012 |
Current: |  |  |  |  |  |  |
Federal |  | $ | 45.5 |  | $ | (24.3 | ) | $ | 38.9 |
State |  | 3.7 |  | (1.0 | ) | 3.2 |
Total |  | 49.2 |  | (25.3 | ) | 42.1 |
Deferred |  | 2.7 |  | 57.5 |  | (9.1 | )
Total income tax expense |  | $ | 51.9 |  | $ | 32.2 |  | $ | 33.0 |
Schedule of reasons why income tax expense differs from amounts computed by applying the statutory federal rate to income from continuing operations |
|  | Years Ended December 31, |
|  | 2014 |  | 2013 |  | 2012 |
Computed federal income tax expense |  | 35.0% |  | 35.0% |  | 35.0% |
State income tax |  | 2.2% |  | 2.9% |  | 0.6% |
Deferred tax adjustment |  | (0.9% | ) | 0.0% |  | (1.6% | )
Separation costs |  | 0.0% |  | 0.0% |  | 2.0% |
Transaction costs |  | 1.4% |  | 0.0% |  | 0.0% |
Unrecognized tax benefits |  | (0.4% | ) | (2.1% | ) | 1.7% |
Valuation allowance |  | 3.3% |  | 0.0% |  | 0.0% |
Other — net |  | 1.7% |  | 1.7% |  | 1.1% |
Effective income tax rate |  | 42.3% |  | 37.5% |  | 38.8% |
Schedule of tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities |
|  | As of December 31, |
|  | 2014 |  | 2013 |
Deferred tax assets: |  |  |  |  |
Benefit plans |  | $ | 63.6 |  | $ | 41.8 |
Insurance reserves |  | 11.4 |  | 10.0 |
Allowance for doubtful accounts |  | 1.4 |  | 1.3 |
Reserves |  | 2.1 |  | 6.0 |
Foreign losses |  | 4.1 |  | 3.1 |
Alternative minimum tax credits |  | 1.5 |  | 1.4 |
Other |  | 0.8 |  | (0.2 | )
Total deferred tax assets |  | 84.9 |  | 63.4 |
Valuation allowance |  | (4.1 | ) | — |
Total Deferred tax assets, net of valuation allowance |  | 80.8 |  | 63.4 |
Deferred tax liabilities: |  |  |  |  |
Basis differences for property and equipment |  | 252.7 |  | 278.0 |
Capital Construction Fund |  | 106.9 |  | 83.4 |
Joint ventures and other investments |  | 7.7 |  | 4.6 |
Deferred revenue |  | 10.1 |  | 11.4 |
Amortization |  | 3.8 |  | 3.0 |
Total deferred tax liabilities |  | 381.2 |  | 380.4 |
Deferred tax liability, net |  | $ | 300.4 |  | $ | 317.0 |
Reconciliation of unrecognized tax benefits |
Balance at December 31, 2011 |  | $ | 2.6 |
Additions for tax positions of prior years |  | 4.0 |
Reductions for tax positions of current year |  | 3.7 |
Reductions for tax positions of prior years |  | (1.0 | )
Reductions for lapse of statute of limitations |  | (1.0 | )
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 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of the change in unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 55 -Paragraph 217 -URI http://asc.fasb.org/extlink&oid=32707879&loc=d3e36027-109320 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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