OTHER	9 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]
OTHER	OTHER Short-Term Debt and Commercial Paper As of September 30, 2018, we had $1.2 billion of short-term borrowings due within one year, of which $750 million was comprised of our 1.85% notes and $490 million was comprised of commercial paper borrowings with a weighted-average rate of 2.35%. As of December 31, 2017 we had $750 million of short-term borrowings comprised of our 1.85% notes and no commercial paper borrowings outstanding. On August 24, 2018, we entered into a new $2.5 billion revolving credit facility (the 5-year Facility) with various banks that is available for general corporate purposes and which has an expiration date of August 24, 2023. The undrawn portion of the 5-year Facility is also available to serve as a backup facility for the issuance of commercial paper. We may request and the banks may grant, at their discretion, an increase in the borrowing capacity under the 5-year Facility of up to an additional $500 million. There were no borrowings outstanding under the 5-year Facility at September 30, 2018. In September 2017, we issued notes totaling approximately $1.6 billion with a fixed interest rate of 4.09%, maturing in September 2052 in exchange for outstanding notes totaling approximately $1.4 billion with fixed interest rates ranging from 4.70% to 8.50% maturing 2029 to 2046. In connection with the exchange of principal, we paid a premium of $237 million, substantially all of which was in the form of new notes. Equity Method Investee Impairment During the quarter ended March 26, 2017, equity earnings included a charge recorded of approximately $64 million ($40 million, or $0.14 per share, after tax), which represented our portion of a non-cash asset impairment related to certain long-lived assets held by our equity method investee, AMMROC. As of September 30, 2018, our equity method investment in AMMROC totaled approximately $560 million. We are continuing to monitor this investment in light of ongoing performance, business base and economic issues and we may have to record our portion of additional charges, or an impairment of our investment, or both, should the carrying value of our investment exceed its fair value. These charges could adversely affect our results of operations. Severance and Restructuring Charges During the second quarter of 2018, we recorded charges totaling $96 million ($76 million, or $0.26 per share, after tax) related to certain severance and restructuring actions at our RMS business segment. These charges consist of $75 million of severance costs for the planned elimination of certain positions through either voluntary or involuntary actions and $21 million of asset impairment charges associated with our decision to consolidate certain operations. Upon separation, terminated employees will receive lump-sum severance payments primarily based on years of service, a majority of which we expect to pay by the end of 2019. These actions resulted from a strategic review of our RMS business segment and are intended to improve the efficiency of our operations and better align our organization and cost structure with changing economic conditions. We expect to recover a portion of the severance and restructuring charges through the pricing of our products and services to the U.S. Government and other customers in future periods, which will be included in RMS’ operating results. During the quarter and nine months ended September 30, 2018, we paid approximately $10 million in severance payments associated with these actions. Income Taxes Our effective income tax rates were 6.5% and 12.9% for the quarter and nine months ended September 30, 2018, and 25.8% and 26.3% for the quarter and nine months ended September 24, 2017. The lower rate for the quarter and nine months ended September 30, 2018 was primarily due to the reduction of the federal statutory rate from 35% to 21% and the deduction for foreign derived intangible income, both as a result of the Tax Cuts and Jobs Act of 2017 (the Tax Act) enacted in December 2017. The rates for both periods benefited from tax deductions for dividends paid to our defined contribution plans with an employee stock ownership plan feature, tax deductions for employee equity awards, and the research and development tax credit. The rate for the quarter and nine months ended September 30, 2018 benefited from our change in a tax accounting method recorded discretely in this quarter, reflecting a 2012 Court of Federal Claims decision, which held that the tax basis in certain assets should be increased and realized upon the assets’ disposition. The rate for the quarter and nine months ended September 24, 2017 benefited from tax deductions for U.S. manufacturing activities, which the Tax Act repealed for years after 2017. While we have substantially completed our provisional analysis of the income tax effects of the Tax Act as of December 31, 2017 and recorded a reasonable estimate in 2017 of such effects, actual effects may differ, possibly materially, due to, among other things, further refinement of our calculations, changes in interpretations and assumptions that we have made, additional guidance that may be issued by the U.S. Government, and actions and related accounting policy decisions we may take as a result of the Tax Act. We will complete our analysis of the impact of the Tax Act for 2017 over a one-year measurement period ending December 22, 2018, and any adjustments during this measurement period will be included in net earnings as an adjustment to income tax expense in the reporting period when such adjustments are determined. During the first nine months of 2018 we have not identified any material change to the net one-time charge for the year ended December 31, 2017 related to the Tax Act.

OTHER

Short-Term Debt and Commercial Paper

As of September 30, 2018, we had $1.2 billion of short-term borrowings due within one year, of which $750 million was comprised of our 1.85% notes and $490 million was comprised of commercial paper borrowings with a weighted-average rate of 2.35%. As of December 31, 2017 we had $750 million of short-term borrowings comprised of our 1.85% notes and no commercial paper borrowings outstanding.

On August 24, 2018, we entered into a new $2.5 billion revolving credit facility (the 5-year Facility) with various banks that is available for general corporate purposes and which has an expiration date of August 24, 2023. The undrawn portion of the 5-year Facility is also available to serve as a backup facility for the issuance of commercial paper. We may request and the banks may grant, at their discretion, an increase in the borrowing capacity under the 5-year Facility of up to an additional $500 million. There were no borrowings outstanding under the 5-year Facility at September 30, 2018.

In September 2017, we issued notes totaling approximately $1.6 billion with a fixed interest rate of 4.09%, maturing in September 2052 in exchange for outstanding notes totaling approximately $1.4 billion with fixed interest rates ranging from 4.70% to 8.50% maturing 2029 to 2046. In connection with the exchange of principal, we paid a premium of $237 million, substantially all of which was in the form of new notes.

Equity Method Investee Impairment

During the quarter ended March 26, 2017, equity earnings included a charge recorded of approximately $64 million ($40 million, or $0.14 per share, after tax), which represented our portion of a non-cash asset impairment related to certain long-lived assets held by our equity method investee, AMMROC. As of September 30, 2018, our equity method investment in AMMROC totaled approximately $560 million. We are continuing to monitor this investment in light of ongoing performance, business base and economic issues and we may have to record our portion of additional charges, or an impairment of our investment, or both, should the carrying value of our investment exceed its fair value. These charges could adversely affect our results of operations.

Severance and Restructuring Charges

During the second quarter of 2018, we recorded charges totaling $96 million ($76 million, or $0.26 per share, after tax) related to certain severance and restructuring actions at our RMS business segment. These charges consist of $75 million of severance costs for the planned elimination of certain positions through either voluntary or involuntary actions and $21 million of asset impairment charges associated with our decision to consolidate certain operations. Upon separation, terminated employees will receive lump-sum severance payments primarily based on years of service, a majority of which we expect to pay by the end of 2019. These actions resulted from a strategic review of our RMS business segment and are intended to improve the efficiency of our operations and better align our organization and cost structure with changing economic conditions. We expect to recover a portion of the severance and restructuring charges through the pricing of our products and services to the U.S. Government and other customers in future periods, which will be included in RMS’ operating results. During the quarter and nine months ended September 30, 2018, we paid approximately $10 million in severance payments associated with these actions.

Income Taxes

Our effective income tax rates were 6.5% and 12.9% for the quarter and nine months ended September 30, 2018, and 25.8% and 26.3% for the quarter and nine months ended September 24, 2017. The lower rate for the quarter and nine months ended September 30, 2018 was primarily due to the reduction of the federal statutory rate from 35% to 21% and the deduction for foreign derived intangible income, both as a result of the Tax Cuts and Jobs Act of 2017 (the Tax Act) enacted in December 2017. The rates for both periods benefited from tax deductions for dividends paid to our defined contribution plans with an employee stock ownership plan feature, tax deductions for employee equity awards, and the research and development tax credit. The rate for the quarter and nine months ended September 30, 2018 benefited from our change in a tax accounting method recorded discretely in this quarter, reflecting a 2012 Court of Federal Claims decision, which held that the tax basis in certain assets should be increased and realized upon the assets’ disposition. The rate for the quarter and nine months ended September 24, 2017 benefited from tax deductions for U.S. manufacturing activities, which the Tax Act repealed for years after 2017.

While we have substantially completed our provisional analysis of the income tax effects of the Tax Act as of December 31, 2017 and recorded a reasonable estimate in 2017 of such effects, actual effects may differ, possibly materially, due to, among other things, further refinement of our calculations, changes in interpretations and assumptions that we have made, additional guidance that may be issued by the U.S. Government, and actions and related accounting policy decisions we may take as a result of the Tax Act. We will complete our analysis of the impact of the Tax Act for 2017 over a one-year measurement period ending December 22, 2018, and any adjustments during this measurement period will be included in net earnings as an adjustment to income tax expense in the reporting period when such adjustments are determined. During the first nine months of 2018 we have not identified any material change to the net one-time charge for the year ended December 31, 2017 related to the Tax Act.