New Accounting Pronouncements	6 Months Ended
Mar. 30, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements From time to time, the Financial Accounting Standards Board (“FASB”) issues accounting standards updates (each being an “ASU”) to its Accounting Standards Codification (“ASC”), which constitutes the primary source of U.S. GAAP. The Company regularly monitors ASUs as they are issued and considers their applicability to its business. All ASUs applicable to the Company are adopted by their effective dates and in the manner prescribed by the FASB. Revenue Recognition In May 2014, the FASB issued ASU No. 2014-09 Revenue from Contracts with Customers. The new guidance provided by ASU 2014-09 is intended to remove inconsistencies and perceived weaknesses in the existing revenue requirements, provide a more robust framework for addressing revenue issues, improve comparability, provide more useful information and simplify the preparation of financial statements. The effective date for ASU 2014-09 is for annual reporting periods beginning after December 15, 2017 and interim periods therein. The Company’s adoption activities are being performed over three phases: (i) assessment, (ii) design, and (iii) implementation. Our assessment and design phases are substantially complete. We have established a cross-functional team to implement ASU 2014-09. Additionally, we have identified selected changes to our systems, processes and internal controls and are in the process of designing updates for each to meet the standard’s revised reporting and disclosure requirements. The Company continues to evaluate the impact of ASU 2014-09 to the CH2M business and we are largely complete with the assessment phase. We expect to update CH2M’s accounting policies, processes and controls to align with the policies, processes and controls being implemented across the Company. We are in the process of implementing the changes discovered during the assessment and design phases. The following are the potential significant differences identified to date: Performance Obligations Under current U.S. GAAP, the Company typically segments contracts among service types, such as engineering and construction services, for purposes of revenue recognition. Under ASU 2014-09, the Company has determined, in most instances, it is likely that engineering and construction services will be required to be combined into a single performance obligation. In these instances, this will likely change the timing and pattern of revenue recognition. Contract Modifications In many instances, the Company enters into contracts for construction services subsequent to entering into engineering services contracts (“Phased Projects”). Under ASU 2014-09, the construction services contract may be deemed to modify the engineering contract, or may be required to be combined with the engineering contract. This modification or combination of contracts may result in a cumulative catchup adjustment, which will have an immediate impact on the Company’s results of operations in the period the contract combination or modification occurs. In addition, it will change the timing and pattern of revenue recognition after the period the contracts have been combined or modified. The Company analyzed its current Phased Projects and concluded that a significant number of these arrangements would be combined under ASU 2014-09. The Company currently intends to adopt the new standard using the Modified Retrospective application. This standard could have a significant impact on the Company’s Consolidated Financial Statements and an administrative impact on its operations and will depend on the magnitude of the items discussed above. The Company will continue to evaluate the impact through the implementation phase. Lease Accounting In February 2016, the FASB issued ASU 2016-02 Leases. ASU 2016-02 requires lessees to recognize assets and liabilities for most leases. ASU 2016-02 is effective for public entity financial statements for annual periods beginning after December 15, 2018, and interim periods within those annual periods. Early adoption is permitted, including adoption in an interim period. The new guidance currently requires a modified retrospective transition approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. In January 2018, the FASB released an exposure draft that, if issued in its current form, would provide us with the option to adopt the provisions of the new guidance prospectively, without adjusting the comparative periods presented. The Company is evaluating the impact of the new guidance on its consolidated financial statements. This standard could have a significant administrative impact on its operations, and the Company will further assess the impact through its implementation program. Other Pronouncements In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. ASU 2017-12 provides financial reporting improvements related to hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. Additionally, ASU No. 2017-12 makes certain targeted improvements to simplify the application of the hedge accounting guidance. The revised guidance becomes effective for fiscal years beginning after December 15, 2018 with early adoption permitted. The Company is evaluating the impact of the new guidance on its consolidated financial statements. It is not expected that the updated guidance will have a significant impact on the Company’s consolidated financial statements. ASU 2017-04, Simplifying the Test for Goodwill Impairment, is effective for fiscal years beginning after December 15, 2019 with early adoption permitted. ASU 2017-04 removes the second step of the goodwill impairment test, which requires a hypothetical purchase price allocation. An entity will now recognize a goodwill impairment charge for the amount by which a reporting unit's carrying value exceeds its fair value, not to exceed the amount of goodwill allocated to the reporting unit. Management does not expect the adoption of ASU 2017-04 to have any impact on the Company's financial position, results of operations or cash flows. In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. ASU 2018-02 is effective for interim and annual reporting periods beginning after December 15, 2018, with early adoption permitted. Management is currently evaluating the impact that the adoption of ASU 2018-02 will have on the Company's financial position, results of operations and cash flows.

New Accounting Pronouncements

From time to time, the Financial Accounting Standards Board (“FASB”) issues accounting standards updates (each being an “ASU”) to its Accounting Standards Codification (“ASC”), which constitutes the primary source of U.S. GAAP. The Company regularly monitors ASUs as they are issued and considers their applicability to its business. All ASUs applicable to the Company are adopted by their effective dates and in the manner prescribed by the FASB.

Revenue Recognition

In May 2014, the FASB issued ASU No. 2014-09 Revenue from Contracts with Customers. The new guidance provided by ASU 2014-09 is intended to remove inconsistencies and perceived weaknesses in the existing revenue requirements, provide a more robust framework for addressing revenue issues, improve comparability, provide more useful information and simplify the preparation of financial statements. The effective date for ASU 2014-09 is for annual reporting periods beginning after December 15, 2017 and interim periods therein.

The Company’s adoption activities are being performed over three phases: (i) assessment, (ii) design, and (iii) implementation. Our assessment and design phases are substantially complete. We have established a cross-functional team to implement ASU 2014-09. Additionally, we have identified selected changes to our systems, processes and internal controls and are in the process of designing updates for each to meet the standard’s revised reporting and disclosure requirements. The Company continues to evaluate the impact of ASU 2014-09 to the CH2M business and we are largely complete with the assessment phase. We expect to update CH2M’s accounting policies, processes and controls to align with the policies, processes and controls being implemented across the Company. We are in the process of implementing the changes discovered during the assessment and design phases. The following are the potential significant differences identified to date:

Performance Obligations

Under current U.S. GAAP, the Company typically segments contracts among service types, such as engineering and construction services, for purposes of revenue recognition. Under ASU 2014-09, the Company has determined, in most instances, it is likely that engineering and construction services will be required to be combined into a single performance obligation. In these instances, this will likely change the timing and pattern of revenue recognition.

Contract Modifications

In many instances, the Company enters into contracts for construction services subsequent to entering into engineering services contracts (“Phased Projects”). Under ASU 2014-09, the construction services contract may be deemed to modify the engineering contract, or may be required to be combined with the engineering contract. This modification or combination of contracts may result in a cumulative catchup adjustment, which will have an immediate impact on the Company’s results of operations in the period the contract combination or modification occurs. In addition, it will change the timing and pattern of revenue recognition after the period the contracts have been combined or modified. The Company analyzed its current Phased Projects and concluded that a significant number of these arrangements would be combined under ASU 2014-09.

The Company currently intends to adopt the new standard using the Modified Retrospective application. This standard could have a significant impact on the Company’s Consolidated Financial Statements and an administrative impact on its operations and will depend on the magnitude of the items discussed above. The Company will continue to evaluate the impact through the implementation phase.

Lease Accounting

In February 2016, the FASB issued ASU 2016-02 Leases. ASU 2016-02 requires lessees to recognize assets and liabilities for most leases. ASU 2016-02 is effective for public entity financial statements for annual periods beginning after December 15, 2018, and interim periods within those annual periods. Early adoption is permitted, including adoption in an interim period. The new guidance currently requires a modified retrospective transition approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. In January 2018, the FASB released an exposure draft that, if issued in its current form, would provide us with the option to adopt the provisions of the new guidance prospectively, without adjusting the comparative periods presented. The Company is evaluating the impact of the new guidance on its consolidated financial statements. This standard could have a significant administrative impact on its operations, and the Company will further assess the impact through its implementation program.

Other Pronouncements

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. ASU 2017-12 provides financial reporting improvements related to hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. Additionally, ASU No. 2017-12 makes certain targeted improvements to simplify the application of the hedge accounting guidance. The revised guidance becomes effective for fiscal years beginning after December 15, 2018 with early adoption permitted. The Company is evaluating the impact of the new guidance on its consolidated financial statements. It is not expected that the updated guidance will have a significant impact on the Company’s consolidated financial statements.

ASU 2017-04, Simplifying the Test for Goodwill Impairment, is effective for fiscal years beginning after December 15, 2019 with early adoption permitted. ASU 2017-04 removes the second step of the goodwill impairment test, which requires a hypothetical purchase price allocation. An entity will now recognize a goodwill impairment charge for the amount by which a reporting unit's carrying value exceeds its fair value, not to exceed the amount of goodwill allocated to the reporting unit. Management does not expect the adoption of ASU 2017-04 to have any impact on the Company's financial position, results of operations or cash flows.

In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. ASU 2018-02 is effective for interim and annual reporting periods beginning after December 15, 2018, with early adoption permitted. Management is currently evaluating the impact that the adoption of ASU 2018-02 will have on the Company's financial position, results of operations and cash flows.