Accounting Policies	6 Months Ended
Jun. 30, 2017
Accounting Policies [Abstract]
Accounting Policies	ACCOUNTING POLICIES In our opinion, the accompanying unaudited condensed consolidated financial statements contain all adjustments, of a normal recurring nature, necessary to fairly state our financial position at June 30, 2017, our results of operations and comprehensive income (loss) for the three-month and six-month periods ended June 30, 2017 and 2016, and cash flows and changes in shareholders' equity for the six-month periods ended June 30, 2017 and 2016. The condensed consolidated balance sheet at December 31, 2016 was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America. Reclassification. Certain prior year amounts have been reclassified to conform to the 2017 presentation in the condensed consolidated financial statements. Recently Adopted Accounting Pronouncements. In July 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2015-11, "Inventory (Topic 330): Simplifying the Measurement of Inventory," which requires that inventory within the scope of the guidance be measured at the lower of cost and net realizable value, as opposed to the lower of cost or market. We adopted ASU 2015-11 on January 1, 2017. The adoption of the new standard did not have an impact on our financial position or results of operations. In March 2016, the FASB issued ASU 2016-09, “Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting,” which requires the tax effects related to share-based payments to be recorded through the income statement, simplifies the accounting requirements for forfeitures and employers' tax withholding requirements, and modifies the presentation of certain items on the statement of cash flows. We adopted ASU 2016-09 on January 1, 2017, using the retrospective options for reclassifying excess tax benefit from stock-based compensation and employee withholding taxes paid on stock-based compensation within our statement of cash flows. The adoption of the remaining requirements did not have an impact on our financial position or results of operation. As a result of this adoption, we increased cash flows from (for) operating activities and decreased cash flows from (for) financing activities by $36 million for the six-month period ended June 30, 2016. For full year 2016 and 2015, we currently estimate increasing cash flows from (for) operating activities and decreasing cash flows from (for) financing activities by $62 million and $111 million, respectively. Subsequent to adoption, tax effects related to employee share-based payments will be recorded to income tax expense, thus increasing the volatility in our effective tax rate. In January 2017, the FASB issued ASU 2017-04, "Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment," which removes Step 2 of the goodwill impairment test. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. We early adopted ASU 2017-04 effective January 1, 2017. The adoption of the new standard did not have an impact on our financial position or results of operations. Recently Issued Accounting Pronouncements. In May 2014, FASB issued a new standard for revenue recognition, Accounting Standards Codification ("ASC") 606. The purpose of ASC 606 is to provide a single, comprehensive revenue recognition model for all contracts with customers to improve comparability across industries. The standard allows for either a full retrospective or modified retrospective method of adoption. We are finalizing our assessment of the impact of the adoption; however, currently, we do not expect the adoption will have a material impact on our financial position or results of operations. We currently anticipate adopting this standard on its effective date, January 1, 2018, under the full retrospective method of adoption. We have not experienced significant issues in our implementation process and we do not anticipate significant changes to our accounting policies. In January 2016, the FASB issued ASU 2016-01, “Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities,” which primarily affects the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. ASU 2016-01 is effective for us for annual periods beginning January 1, 2018. The adoption of this standard is not expected to have a material impact on our financial position or results of operations. In February 2016, the FASB issued a new standard for leases, ASC 842, which changes the accounting model for identifying and accounting for leases. ASC 842 is effective for us for annual periods beginning January 1, 2019 and requires retrospective application. We expect this standard to increase our total assets and total liabilities; however, we are currently evaluating the magnitude of the impact the adoption of this new standard will have on our financial position and results of operations. A. ACCOUNTING POLICIES (Concluded) In March 2017, the FASB issued ASU 2017-07, "Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost," which modifies the presentation of net periodic pension and post-retirement benefit cost ("net benefit cost") in the income statement and the components eligible for capitalization as assets. ASC 2017-07 is effective for us for annual periods beginning January 1, 2018. We are currently evaluating the impact the adoption of this new standard will have on our financial position and results of operations; however, we expect the impact to be limited to the reclassification of non-service cost components of net benefit cost from operating profit to other income (expense), net, within our results of operations. In May 2017, the FASB issued ASU 2017-09, "Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting," which clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. ASC 2017-09 is effective for us for annual periods beginning January 1, 2018. We are currently evaluating the impact the adoption of this new standard will have on our financial position and results of operations.

ACCOUNTING POLICIES

In our opinion, the accompanying unaudited condensed consolidated financial statements contain all adjustments, of a normal recurring nature, necessary to fairly state our financial position at June 30, 2017, our results of operations and comprehensive income (loss) for the three-month and six-month periods ended June 30, 2017 and 2016, and cash flows and changes in shareholders' equity for the six-month periods ended June 30, 2017 and 2016. The condensed consolidated balance sheet at December 31, 2016 was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America.

Reclassification. Certain prior year amounts have been reclassified to conform to the 2017 presentation in the condensed consolidated financial statements.

Recently Adopted Accounting Pronouncements. In July 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2015-11, "Inventory (Topic 330): Simplifying the Measurement of Inventory," which requires that inventory within the scope of the guidance be measured at the lower of cost and net realizable value, as opposed to the lower of cost or market. We adopted ASU 2015-11 on January 1, 2017. The adoption of the new standard did not have an impact on our financial position or results of operations.

In March 2016, the FASB issued ASU 2016-09, “Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting,” which requires the tax effects related to share-based payments to be recorded through the income statement, simplifies the accounting requirements for forfeitures and employers' tax withholding requirements, and modifies the presentation of certain items on the statement of cash flows. We adopted ASU 2016-09 on January 1, 2017, using the retrospective options for reclassifying excess tax benefit from stock-based compensation and employee withholding taxes paid on stock-based compensation within our statement of cash flows. The adoption of the remaining requirements did not have an impact on our financial position or results of operation. As a result of this adoption, we increased cash flows from (for) operating activities and decreased cash flows from (for) financing activities by $36 million for the six-month period ended June 30, 2016. For full year 2016 and 2015, we currently estimate increasing cash flows from (for) operating activities and decreasing cash flows from (for) financing activities by $62 million and $111 million, respectively. Subsequent to adoption, tax effects related to employee share-based payments will be recorded to income tax expense, thus increasing the volatility in our effective tax rate.

In January 2017, the FASB issued ASU 2017-04, "Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment," which removes Step 2 of the goodwill impairment test. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. We early adopted ASU 2017-04 effective January 1, 2017. The adoption of the new standard did not have an impact on our financial position or results of operations.

Recently Issued Accounting Pronouncements. In May 2014, FASB issued a new standard for revenue recognition, Accounting Standards Codification ("ASC") 606. The purpose of ASC 606 is to provide a single, comprehensive revenue recognition model for all contracts with customers to improve comparability across industries. The standard allows for either a full retrospective or modified retrospective method of adoption. We are finalizing our assessment of the impact of the adoption; however, currently, we do not expect the adoption will have a material impact on our financial position or results of operations. We currently anticipate adopting this standard on its effective date, January 1, 2018, under the full retrospective method of adoption. We have not experienced significant issues in our implementation process and we do not anticipate significant changes to our accounting policies.

In January 2016, the FASB issued ASU 2016-01, “Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities,” which primarily affects the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. ASU 2016-01 is effective for us for annual periods beginning January 1, 2018. The adoption of this standard is not expected to have a material impact on our financial position or results of operations.

In February 2016, the FASB issued a new standard for leases, ASC 842, which changes the accounting model for identifying and accounting for leases. ASC 842 is effective for us for annual periods beginning January 1, 2019 and requires retrospective application. We expect this standard to increase our total assets and total liabilities; however, we are currently evaluating the magnitude of the impact the adoption of this new standard will have on our financial position and results of operations.

A. ACCOUNTING POLICIES (Concluded)

In March 2017, the FASB issued ASU 2017-07, "Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost," which modifies the presentation of net periodic pension and post-retirement benefit cost ("net benefit cost") in the income statement and the components eligible for capitalization as assets. ASC 2017-07 is effective for us for annual periods beginning January 1, 2018. We are currently evaluating the impact the adoption of this new standard will have on our financial position and results of operations; however, we expect the impact to be limited to the reclassification of non-service cost components of net benefit cost from operating profit to other income (expense), net, within our results of operations.

In May 2017, the FASB issued ASU 2017-09, "Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting," which clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. ASC 2017-09 is effective for us for annual periods beginning January 1, 2018. We are currently evaluating the impact the adoption of this new standard will have on our financial position and results of operations.