v2.4.0.6

Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2011
Valuation Allowance [Line Items] |
Components of the provision for income taxes | The components of the provision for income taxes for the years ended December 31, are as follows:
|  | 2011 |  |  | 2010 |  |  | 2009 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 201.7 |  |  | $ | 253.9 |  |  | $ | 337.3 |
State |  |  | 38.6 |  |  |  | 50.2 |  |  |  | 49.1 |
Federal and state deferred provision (benefit) |  |  | 334.8 |  |  |  | 61.4 |  |  |  | (24.6 | )
Uncertain tax positions and interest |  |  | (257.7 | ) |  |  | 4.0 |  |  |  | 6.7 |
Provision for income taxes |  | $ | 317.4 |  |  | $ | 369.5 |  |  | $ | 368.5 |
Reconciliations of the statutory federal income tax rate to our effective tax rate | The reconciliations of the statutory federal income tax rate to our effective tax rate for the years ended December 31, are as follows:
|  | 2011 |  |  | 2010 |  |  | 2009 |
Federal statutory rate |  |  | 35.0 | % |  |  | 35.0 | % |  |  | 35.0 | %
State income taxes, net of federal benefit |  |  | 3.2 |  |  |  | 5.4 |  |  |  | 3.4 |
Non-deductible expenses |  |  | 1.6 |  |  |  | 2.1 |  |  |  | 2.6 |
Uncertain tax position taxes and interest |  |  | (2.5 | ) |  |  | 0.3 |  |  |  | 0.8 |
Other, net |  |  | (2.3 | ) |  |  | (0.7 | ) |  |  | 0.8 |
Effective income tax rate |  |  | 35.0 | % |  |  | 42.1 | % |  |  | 42.6 | %
Components of the net deferred income tax asset and liability | The components of the net deferred income tax asset and liability at December 31, 2011 and 2010 are as follows:
|  | 2011 |  |  | 2010 |
Deferred tax liabilities relating to: |  |  |  |  |  |  |  |
Differences between book and tax basis of property |  | $ | (913.7 | ) |  | $ | (721.7 | )
Difference between book and tax basis of intangible assets |  |  | (692.1 | ) |  |  | (702.0 | )
Basis difference due to redemption of partnership interests |  |  | (128.2 | ) |  |  | - |
Total liabilities |  | $ | (1,734.0 | ) |  | $ | (1,423.7 | )
Deferred tax assets relating to: |  |  |  |  |  |  |  |
Environmental reserves |  | $ | 331.3 |  |  | $ | 346.3 |
Accruals not currently deductible |  |  | 310.3 |  |  |  | 312.8 |
Net operating loss carryforwards, state taxes |  |  | 126.3 |  |  |  | 127.5 |
Difference between book and tax basis of other assets |  |  | 93.3 |  |  |  | 68.1 |
Deferred taxes on uncertain tax positions |  |  | 28.9 |  |  |  | 76.1 |
Other |  |  | 2.0 |  |  |  | 2.3 |
Total assets |  |  | 892.1 |  |  |  | 933.1 |
Valuation allowance |  |  | (118.1 | ) |  |  | (120.1 | )
Net deferred tax asset |  |  | 774.0 |  |  |  | 813.0 |
Net deferred tax liabilities |  | $ | (960.0 | ) |  | $ | (610.7 | )
Summarization of activity in our gross unrecognized tax benefits | The following table summarizes the activity in our gross unrecognized tax benefits for the years ended December 31:
|  | 2011 |  |  | 2010 |  |  | 2009 |
Balance at beginning of year |  | $ | 222.8 |  |  | $ | 242.2 |  |  | $ | 611.9 |
Additions due to the acquisition of Allied |  |  | - |  |  |  | - |  |  |  | 13.3 |
Additions based on tax positions related to current year |  |  | - |  |  |  | 2.8 |  |  |  | 3.9 |
Additions for tax positions of prior years |  |  | 0.6 |  |  |  | 7.5 |  |  |  | 5.6 |
Reductions for tax positions of prior years |  |  | (162.2 | ) |  |  | (7.4 | ) |  |  | (24.1 | )
Reductions for tax positions resulting from lapse of statute of limitations |  |  | - |  |  |  | (10.4 | ) |  |  | (0.5 | )
Settlements |  |  | (6.9 | ) |  |  | (11.9 | ) |  |  | (367.9 | )
Balance at end of year |  | $ | 54.3 |  |  | $ | 222.8 |  |  | $ | 242.2 |
Valuation allowance of deferred tax assets [Member] |
Valuation Allowance [Line Items] |
Changes in the deferred tax valuation allowance | Changes in the deferred tax valuation allowance for the years ended December 31, 2011, 2010 and 2009 are as follows:
|  | 2011 |  |  | 2010 |  |  | 2009 |
Valuation allowance, beginning of year |  | $ | 120.1 |  |  | $ | 126.5 |  |  | $ | 156.4 |
Additions charged to income |  |  | 2.1 |  |  |  | 8.3 |  |  |  | 5.2 |
Acquisitions |  |  | - |  |  |  | - |  |  |  | (2.5 | )
Usage |  |  | (4.3 | ) |  |  | (10.4 | ) |  |  | (9.3 | )
Expirations of state net operating losses |  |  | (0.3 | ) |  |  | (0.3 | ) |  |  | (17.8 | )
Other, net |  |  | 0.5 |  |  |  | (4.0 | ) |  |  | (5.5 | )
Valuation allowance, end of year |  | $ | 118.1 |  |  | $ | 120.1 |  |  | $ | 126.5 |

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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 -Topic 740 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 9 -Section 50 -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 -Topic 740 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 2 -Section 50 -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 -Topic 740 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 12 -Section 50 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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