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PROVISION FOR INCOME TAXES | 6 Months Ended
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Jun. 30, 2017
Income Tax Disclosure [Abstract] |
PROVISION FOR INCOME TAXES | PROVISION FOR INCOME TAXES
| Second Quarter |  | First Six Months
(Dollars in millions) | 2017 |  | 2016 |  | 2017 |  | 2016
| $ |  | % |  | $ |  | % |  | $ |  | % |  | $ |  | %
Provision for income taxes and tax rate | $ | 65 |  |  | 18 | % |  | $ | 67 |  |  | 21 | % |  | $ | 127 |  |  | 18 | % |  | $ | 139 |  |  | 22 | %
The second quarter and first six months 2017 effective tax rates include a $22 million tax benefit to reflect finalization of prior years' income tax returns. The first six months 2017 effective tax rate also reflects a $22 million tax benefit due to planned amendments to prior years' income tax returns. The second quarter and first six months 2016 effective tax rates include a $16 million one-time benefit for the restoration of tax basis for which depreciation deductions were previously limited. The first six months 2016 effective tax rate also reflects a $9 million tax benefit primarily due to adjustments to the tax provision to reflect the finalization of 2014 foreign income tax returns.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 Reference 3: 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=65882285&loc=d3e32718-109319 Reference 4: 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=65882285&loc=d3e32639-109319 Reference 5: 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=65882285&loc=d3e32537-109319 + Details
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