Basis of Presentation and Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidation	The consolidated financial statements include the accounts of KeyCorp and its subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. Some previously reported amounts have been reclassified to conform to current reporting practices. The consolidated financial statements include any voting rights entities in which we have a controlling financial interest. In accordance with the applicable accounting guidance for consolidations, we consolidate a VIE if we have: (i) a variable interest in the entity; (ii) the power to direct activities of the VIE that most significantly affect the entity’s economic performance; and (iii) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE (i.e., we are considered to be the primary beneficiary). Variable interests can include equity interests, subordinated debt, derivative contracts, leases, service agreements, guarantees, standby letters of credit, loan commitments, and other contracts, agreements, and financial instruments. See Note 10 (“Variable Interest Entities”) for information on our involvement with VIEs. We use the equity method to account for unconsolidated investments in voting rights entities or VIEs if we have significant influence over the entity’s operating and financing decisions (usually defined as a voting or economic interest of 20% to 50%, but not controlling). Unconsolidated investments in voting rights entities or VIEs in which we have a voting or economic interest of less than 20% are carried at cost or fair value. Investments held by our registered broker-dealer and investment company subsidiaries (principal investing entities and Real Estate Capital line of business) are carried at fair value. We believe that the unaudited consolidated interim financial statements reflect all adjustments of a normal recurring nature and disclosures that are necessary for a fair presentation of the results for the interim periods presented. The results of operations for the interim period are not necessarily indicative of the results of operations to be expected for the full year. The interim financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our 2016 Form 10-K.
Subsequent Events	In preparing these financial statements, subsequent events were evaluated through the time the financial statements were issued. Financial statements are considered issued when they are widely distributed to all shareholders and other financial statement users or filed with the SEC.
Accounting Guidance Adopted and Pending Adoption	Accounting Guidance Adopted in 2017 Consolidation. In October 2016, the FASB issued new accounting guidance that amends the previous consolidation guidance issued in February 2015, to require a decision maker that holds an interest in a VIE through an entity under common control to only consider its proportionate indirect interest in the VIE in determining whether the decision maker is the VIE’s primary beneficiary. This new guidance eliminates the requirement that a decision maker treat the common control party’s interest in the VIE as if the decision maker held the interest itself, an approach referred to as “full attribution.” The new guidance was effective for interim and annual reporting periods beginning after December 15, 2016 (effective January 1, 2017, for us) on a retrospective basis. The adoption of this accounting guidance did not affect our financial condition or results of operations. Stock-based compensation. In March 2016, the FASB issued new accounting guidance that simplifies the accounting for several aspects of share-based payment transactions, including the related income tax consequences, the classification of awards as either equity or liabilities, and the presentation on the statement of cash flows. This accounting guidance was effective for interim and annual reporting periods beginning after December 15, 2016 (effective January 1, 2017, for us). The method of transition was dependent upon the particular amendment within the new guidance. During the nine months ended September 30, 2017, we recognized $26 million in excess tax benefits within “income taxes” on our income statement that pertained to share-based payment arrangements. Prior to 2017, such excess tax benefits were recorded within “capital surplus” on our balance sheet. Under the new guidance, generally, if our share price increases over an award’s vesting period, the resulting tax windfall will decrease “income taxes.” In a like manner, if our share price decreases over an award’s vesting period, the resulting tax shortfall will increase “income taxes.” This change also removed the impact of the excess tax benefits and deficiencies from the calculation of diluted EPS and is required to be applied on a prospective basis. The adoption of this accounting standard did not materially affect our Consolidated Statements of Cash Flows, nor did it affect retained earnings as of the beginning of the period of adoption. We elected to retain our existing accounting policy of estimating award forfeitures upon the award’s grant date. Equity method investments. In March 2016, the FASB issued new accounting guidance that simplifies the transition to equity method accounting by eliminating the requirement for an investor to make retroactive adjustments to the investment, results of operations, and retained earnings on a step-by-step basis when an investment becomes qualified for equity method accounting. Instead, when an investment qualifies for the equity method due to an increase in ownership or degree of influence, an equity method investor is required to add the cost of acquiring the additional interest to the current basis of the previously held interest and to adopt the equity method of accounting as of the date the investment becomes qualified for the equity method. This accounting guidance became effective prospectively for interim and annual reporting periods beginning after December 15, 2016 (effective January 1, 2017, for us). The adoption of this accounting guidance did not affect our financial condition or results of operations. This guidance will only affect our financial condition or results of operations if there is an applicable change in an investment resulting in the investment qualifying for equity method accounting. Derivatives and hedging. In March 2016, the FASB issued new accounting guidance that requires an entity to use a four-step decision model when assessing contingent call (put) options that can accelerate the payment of principal on debt instruments to determine whether they are clearly and closely related to their debt hosts. This accounting guidance was effective for interim and annual reporting periods beginning after December 15, 2016 (effective January 1, 2017, for us) on a modified retrospective basis. The adoption of this accounting guidance did not affect our financial condition or results of operations. Derivatives and hedging. In March 2016, the FASB issued new accounting guidance that clarifies that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument does not, by itself, require dedesignation, but all other hedge accounting criteria must be met. This accounting guidance was effective for interim and annual reporting periods beginning after December 15, 2016 (effective January 1, 2017, for us) and was implemented using a prospective method. The adoption of this accounting guidance did not affect our financial condition or results of operations. Accounting Guidance Pending Adoption at September 30, 2017 Derivatives and hedging. In August 2017, the FASB issued new accounting guidance to better align hedge accounting with risk management activities. It also reduces the complexity involved in applying hedge accounting. Under this new guidance, the concept of hedge ineffectiveness will be eliminated. Ineffective income generated by cash flow and net investment hedges will be recognized in the same financial reporting period and income statement line item as effective income, so as to reflect the full cost of hedging at one time and in one place. Ineffective income generated by fair value hedges will continue to be reflected in current period earnings; however, it will be recognized in the same income statement line item as effective income. The guidance will also allow any contractually specified variable rate to be designated as the hedged risk in a cash flow hedge. With respect to fair value hedges of interest rate risk, the guidance will allow changes in the fair value of the hedged item to be calculated solely using changes in the benchmark interest rate component of the instrument’s total contractual coupon cash flows. In addition, entities will be able to hedge the portion of a closed portfolio of prepayable assets that are not expected to prepay under the “last-of-layer” method. The guidance will permit for a one-time reclassification of debt securities eligible to be hedged under the “last-of-layer” method from held to maturity to available for sale upon adoption. Partial-term fair value hedges will also be allowed. This guidance is effective for interim and annual reporting periods beginning after December 15, 2018 (effective January 1, 2019, for us). The guidance should be applied on a modified retrospective basis to existing hedge relationships as of the adoption date. Accordingly, a cumulative-effect adjustment will be made to AOCI so that the adjusted amount represents the cumulative change in the hedging instrument’s fair value less any amounts that should have been recognized in earnings under the new accounting model. The corresponding adjustment will be made to opening retained earnings as of the most recent period presented as of the adoption date. Early adoption is permitted, including in interim periods. We are currently evaluating early adoption of this guidance as well as the impact it may have on our financial condition and results of operations. Compensation. In May 2017, the FASB issued new accounting guidance that clarifies when changes to terms and conditions for share-based payment awards should be accounted for as modifications. According to the new guidance, entities should apply the modification guidance unless the fair value of the modified award is the same as the fair value of the original award immediately before modification, the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before modification, and the classification of the modified award (as equity or liability instrument) is the same as the classification of the original award immediately before modification. This accounting guidance is effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us). The guidance should be applied on a prospective basis. Early adoption is permitted, including in interim periods. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations. Receivables. In March 2017, the FASB issued new accounting guidance that shortens the amortization period to the earliest call date for certain callable debt securities held at a premium. Securities held at a discount will continue to be amortized to maturity. This accounting guidance is effective for interim and annual reporting periods beginning after December 15, 2018 (effective January 1, 2019, for us). The guidance should be applied on a modified retrospective basis using a cumulative-effect adjustment. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations. Compensation. In March 2017, the FASB issued new accounting guidance that requires service cost to be included in the same line item as certain other compensation costs related to services rendered by employees. We record compensation costs under personnel expense on the income statement. Other elements of net benefit cost should be presented separately. This accounting guidance is effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us). The guidance should be applied on a retrospective basis. Early adoption is permitted within the first interim period if the entity issues interim financial statements. The adoption of this guidance will result in a reclassification of certain net benefit cost components from personnel expense to other expense on the income statement. There will be no material impact to our financial condition or results of operations. Other income. In February 2017, the FASB issued new accounting guidance that clarifies the scope of asset derecognition guidance and accounting for partial sales of nonfinancial assets. The guidance clarifies that financial assets may be within scope of the derecognition guidance if they are promised to a counterparty in a contract and substantially all the fair value of the assets in the contract are concentrated in nonfinancial assets, which are collectively referred to as in substance nonfinancial assets. The guidance requires entities to derecognize a nonfinancial asset or in substance nonfinancial asset when a counterparty obtains controls of it and, in a partial sale transaction, when it does not have a controlling financial interest in the legal entity that holds the asset. This accounting guidance is effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us). The guidance may be applied on a retrospective or modified retrospective basis. Early adoption is permitted for interim and annual reporting periods beginning after December 15, 2016. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations. Goodwill and other intangibles. In January 2017, the FASB issued new accounting guidance that simplifies the test for goodwill impairment by eliminating the second step of the current two-step method. Under the new guidance, entities will compare the fair value of a reporting unit with its carrying amount. If the carrying amount exceeds the reporting unit’s fair value, the entity is required to recognize an impairment charge for this amount. Current guidance requires an entity to proceed to a second step, whereby the entity would determine the fair value of its assets and liabilities. The new method applies to all reporting units. The performance of a qualitative assessment is still allowable. This accounting guidance is effective prospectively for interim and annual reporting periods beginning after December 15, 2019 (effective January 1, 2020, for us). Early adoption is permitted. The adoption of this accounting guidance is not expected to have a material effect on our financial condition or results of operations. Business combinations. In January 2017, the FASB issued accounting guidance that clarifies the definition of a business and removes the requirement for a market participant to consider whether it could replace missing elements in an integrated set of assets and activities. The guidance states that if substantially all of the fair value of the assets acquired or disposed of is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This accounting guidance will be effective for annual and interim reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us) and should be implemented using a prospective approach. Early application is allowed for transactions for which the acquisition date occurs before the issuance date or effective date of the amendments, as long as the transaction has not been reported in financial statements that have been issued or made available for issuance, and for transactions in which a subsidiary is deconsolidated or a group of assets is derecognized that occurs before the issuance date or effective date of the amendments, as long as the transaction has not been reported in financial statements that have been issued or made available for issuance. Statement of cash flows. In November 2016, the FASB issued accounting guidance requiring restricted cash and restricted cash equivalents to be included with other cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts presented on the statement of cash flows. This accounting guidance will be effective for annual and interim reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us) and should be implemented using a retrospective approach. Early adoption is permitted. The adoption of this accounting guidance is not expected to have a material effect on the presentation of our Consolidated Statements of Cash Flows, as Key does not hold material balances of restricted cash and restricted cash equivalents. Income taxes. In October 2016, the FASB issued accounting guidance requiring an entity to recognize any deferred taxes from an intra-entity transfer of an asset other than inventory when the transfer occurs. This accounting guidance will be effective for annual and interim reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us) and should be implemented using a modified retrospective approach. Early adoption is permitted but only as of the beginning of an annual reporting period for which financial statements have not yet been issued. The adoption of this accounting guidance is not expected to have a material effect on our financial condition or results of operations. Statement of cash flows. In August 2016, the FASB issued new accounting guidance that clarifies how cash receipts and cash payments in certain transactions should be presented and classified in the statement of cash flows. These specific transactions include, but are not limited to, debt prepayment or extinguishment costs, contingent considerations made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, and distributions from equity method investees. This guidance also clarifies that in instances of cash flows with multiple aspects that cannot be separately identified, classification should be based on the activity that is likely to be the predominant source of or use of cash flow. This accounting guidance will be effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us) and should be implemented using a retrospective approach. Early adoption is permitted. The adoption of this accounting guidance is not expected to have a material effect on the presentation of our Consolidated Statements of Cash Flows, as Key’s current policies are either already in-line with the clarifications in the updated guidance, or the related cash flows are not material. Financial instruments. In June 2016, the FASB issued new accounting guidance that changes the methodology for recognizing credit losses related to financial instruments. Under current GAAP, a credit loss is not recognized until it is probable that the loss has been incurred. The new accounting guidance eliminates that threshold and expands the information required for an entity to consider when developing an estimate of expected credit losses, including the use of forecast information. Entities will be required to present financial assets measured on an amortized cost basis at the net amount that is expected to be collected. This new guidance will impact the accounting for our loans, debt securities held to maturity and available for sale, and liabilities for credit losses on unfunded lending-related commitments as well as purchased financial assets with a more-than-insignificant amount of credit deterioration since origination. This accounting guidance will be effective for interim and annual reporting periods beginning after December 15, 2019 (effective January 1, 2020, for us). Early adoption is permitted but only for interim and annual reporting periods beginning after December 15, 2018. This guidance should be implemented using a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective, except for the provisions governing purchased financial assets with credit deterioration and other-than-temporary impairment of debt securities that had been recognized before the effective date. These two provisions must be implemented prospectively. Key has formed a cross-functional implementation working group comprised of teams throughout Key, including finance and credit. The implementation team has developed a high-level project plan, is identifying and researching key interpretive issues, and is in the process of developing models that meet the requirements of the new guidance. The implementation team is also in the process of assessing forecast accuracy and potential macroeconomic factors that will be used to determine the reasonable and supportable forecast period. Key expects that the new guidance will generally result in an increase in its allowance for credit losses, as it will cover credit losses over the full remaining expected life of loans and commitments and will consider future changes in macroeconomic conditions. We are currently evaluating the extent of the increase at the adoption date. Leases. In February 2016, the FASB issued new accounting guidance that requires a lessee to recognize a liability to make lease payments and a right-of-use asset representing its right to use an underlying asset during the lease term for both finance and operating leases. The definition of a lease was modified to exemplify the concept of control over an asset identified in the lease. Lease classification criteria remain substantially similar to criteria in current lease guidance. The guidance defines which payments can be used in determining lease classification. For short-term leases with a term of 12 months or less, lessees can make a policy election not to recognize lease assets and lease liabilities. Lessor accounting is largely unchanged. Leveraged leases that commenced before the effective date of the new guidance are grandfathered. New disclosures are required, and certain practical expedients are allowed upon adoption. This accounting and disclosure guidance will be effective for interim and annual reporting periods beginning after December 15, 2018 (effective January 1, 2019, for us) and should be implemented using the modified retrospective approach. Early adoption is permitted. Key has formed a cross-functional implementation team and has developed a high-level project plan. At December 31, 2016, Key had minimum future rental payments under noncancelable operating leases of $968 million. We are currently evaluating this operating lease population and working to identify our complete lease population, including potential embedded leases. We expect the adoption of this standard to result in additional assets and liabilities, as we will be required to recognize operating leases on our Consolidated Balance Sheet. Other implementation matters to be addressed include, but are not limited to, the determination of the effect on our financial and capital ratios and the quantification of the impact on our financial condition and results of operations. Financial instruments. In January 2016, the FASB issued new accounting guidance that requires equity investments, except those accounted for under the equity method of accounting or consolidated, to be measured at fair value with changes recognized in net income. If there is no readily determinable fair value, the guidance allows entities the ability to measure investments at cost less impairment, whereby impairment is based on a qualitative assessment. The guidance eliminates the requirement to disclose the methods and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost and changes the presentation of financial assets and financial liabilities on the balance sheet or in the footnotes. If an entity has elected the fair value option to measure liabilities, the new accounting guidance requires the portion of the change in the fair value of a liability resulting from credit risk to be presented in OCI. This accounting and disclosure guidance will be effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us). For the provisions of the guidance that are applicable to us, the accounting will be implemented on a modified retrospective basis though a cumulative-effect adjustment to the balance sheet, except for the guidance related to equity securities without readily determinable fair values, which will be applied on a prospective basis. Except under certain instances, early adoption is not permitted. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations. Revenue recognition. In May 2014, the FASB issued new accounting guidance that revises the criteria for determining when to recognize revenue from contracts with customers and expands disclosure requirements. The core principle is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides a five step model to be followed in making this determination. This accounting guidance can be implemented using either a retrospective method or a cumulative-effect approach. This new guidance will be effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us). Early adoption is permitted but only for interim and annual reporting periods beginning after December 15, 2016. We have elected to implement this new accounting guidance using a cumulative-effect approach. We have identified the revenue line items within the scope of the new guidance and are currently finalizing our contract testing related to trust and investment services income, investment banking and debt placement fees, service charges on deposit accounts, and cards and payments income. The guidance will change our presentation of certain underwriting and credit and debit card related costs. Underwriting costs will change from a net presentation to a gross expense. Certain credit and debit card related costs will change from a gross presentation to a reduction in revenue. Additionally, we will expand our qualitative disclosures on those revenues within the scope of the new guidance. While the final assessment is still ongoing, the adoption of this accounting guidance is not expected to have a material effect on our financial condition or results of operations.

Accounting Guidance Adopted in 2017

Consolidation. In October 2016, the FASB issued new accounting guidance that amends the previous consolidation guidance issued in February 2015, to require a decision maker that holds an interest in a VIE through an entity under common control to only consider its proportionate indirect interest in the VIE in determining whether the decision maker is the VIE’s primary beneficiary. This new guidance eliminates the requirement that a decision maker treat the common control party’s interest in the VIE as if the decision maker held the interest itself, an approach referred to as “full attribution.” The new guidance was effective for interim and annual reporting periods beginning after December 15, 2016 (effective January 1, 2017, for us) on a retrospective basis. The adoption of this accounting guidance did not affect our financial condition or results of operations.

Stock-based compensation. In March 2016, the FASB issued new accounting guidance that simplifies the accounting for several aspects of share-based payment transactions, including the related income tax consequences, the classification of awards as either equity or liabilities, and the presentation on the statement of cash flows. This accounting guidance was effective for interim and annual reporting periods beginning after December 15, 2016 (effective January 1, 2017, for us). The method of transition was dependent upon the particular amendment within the new guidance. During the nine months ended September 30, 2017, we recognized $26 million in excess tax benefits within “income taxes” on our income statement that pertained to share-based payment arrangements. Prior to 2017, such excess tax benefits were recorded within “capital surplus” on our balance sheet. Under the new guidance, generally, if our share price increases over an award’s vesting period, the resulting tax windfall will decrease “income taxes.” In a like manner, if our share price decreases over an award’s vesting period, the resulting tax shortfall will increase “income taxes.” This change also removed the impact of the excess tax benefits and deficiencies from the calculation of diluted EPS and is required to be applied on a prospective basis. The adoption of this accounting standard did not materially affect our Consolidated Statements of Cash Flows, nor did it affect retained earnings as of the beginning of the period of adoption. We elected to retain our existing accounting policy of estimating award forfeitures upon the award’s grant date.

Equity method investments. In March 2016, the FASB issued new accounting guidance that simplifies the transition to equity method accounting by eliminating the requirement for an investor to make retroactive adjustments to the investment, results of operations, and retained earnings on a step-by-step basis when an investment becomes qualified for equity method accounting. Instead, when an investment qualifies for the equity method due to an increase in ownership or degree of influence, an equity method investor is required to add the cost of acquiring the additional interest to the current basis of the previously held interest and to adopt the equity method of accounting as of the date the investment becomes qualified for the equity method. This accounting guidance became effective prospectively for interim and annual reporting periods beginning after December 15, 2016 (effective January 1, 2017, for us). The adoption of this accounting guidance did not affect our financial condition or results of operations. This guidance will only affect our financial condition or results of operations if there is an applicable change in an investment resulting in the investment qualifying for equity method accounting.

Derivatives and hedging. In March 2016, the FASB issued new accounting guidance that requires an entity to use a four-step decision model when assessing contingent call (put) options that can accelerate the payment of principal on debt instruments to determine whether they are clearly and closely related to their debt hosts. This accounting guidance was effective for interim and annual reporting periods beginning after December 15, 2016 (effective January 1, 2017, for us) on a modified retrospective basis. The adoption of this accounting guidance did not affect our financial condition or results of operations.

Derivatives and hedging. In March 2016, the FASB issued new accounting guidance that clarifies that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument does not, by itself, require dedesignation, but all other hedge accounting criteria must be met. This accounting guidance was effective for interim and annual reporting periods beginning after December 15, 2016 (effective January 1, 2017, for us) and was implemented using a prospective method. The adoption of this accounting guidance did not affect our financial condition or results of operations.

Accounting Guidance Pending Adoption at September 30, 2017

Derivatives and hedging. In August 2017, the FASB issued new accounting guidance to better align hedge accounting with risk management activities. It also reduces the complexity involved in applying hedge accounting. Under this new guidance, the concept of hedge ineffectiveness will be eliminated. Ineffective income generated by cash flow and net investment hedges will be recognized in the same financial reporting period and income statement line item as effective income, so as to reflect the full cost of hedging at one time and in one place. Ineffective income generated by fair value hedges will continue to be reflected in current period earnings; however, it will be recognized in the same income statement line item as effective income. The guidance will also allow any contractually specified variable rate to be designated as the hedged risk in a cash flow hedge.

With respect to fair value hedges of interest rate risk, the guidance will allow changes in the fair value of the hedged item to be calculated solely using changes in the benchmark interest rate component of the instrument’s total contractual coupon cash flows. In addition, entities will be able to hedge the portion of a closed portfolio of prepayable assets that are not expected to prepay under the “last-of-layer” method. The guidance will permit for a one-time reclassification of debt securities eligible to be hedged under the “last-of-layer” method from held to maturity to available for sale upon adoption. Partial-term fair value hedges will also be allowed.

This guidance is effective for interim and annual reporting periods beginning after December 15, 2018 (effective January 1, 2019, for us). The guidance should be applied on a modified retrospective basis to existing hedge relationships as of the adoption date. Accordingly, a cumulative-effect adjustment will be made to AOCI so that the adjusted amount represents the cumulative change in the hedging instrument’s fair value less any amounts that should have been recognized in earnings under the new accounting model. The corresponding adjustment will be made to opening retained earnings as of the most recent period presented as of the adoption date. Early adoption is permitted, including in interim periods. We are currently evaluating early adoption of this guidance as well as the impact it may have on our financial condition and results of operations.

Compensation. In May 2017, the FASB issued new accounting guidance that clarifies when changes to terms and conditions for share-based payment awards should be accounted for as modifications. According to the new guidance, entities should apply the modification guidance unless the fair value of the modified award is the same as the fair value of the original award immediately before modification, the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before modification, and the classification of the modified award (as equity or liability instrument) is the same as the classification of the original award immediately before modification. This accounting guidance is effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us). The guidance should be applied on a prospective basis. Early adoption is permitted, including in interim periods. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations.

Receivables. In March 2017, the FASB issued new accounting guidance that shortens the amortization period to the earliest call date for certain callable debt securities held at a premium. Securities held at a discount will continue to be amortized to maturity. This accounting guidance is effective for interim and annual reporting periods beginning after December 15, 2018 (effective January 1, 2019, for us). The guidance should be applied on a modified retrospective basis using a cumulative-effect adjustment. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations.

Compensation. In March 2017, the FASB issued new accounting guidance that requires service cost to be included in the same line item as certain other compensation costs related to services rendered by employees. We record compensation costs under personnel expense on the income statement. Other elements of net benefit cost should be presented separately. This accounting guidance is effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us). The guidance should be applied on a retrospective basis. Early adoption is permitted within the first interim period if the entity issues interim financial statements. The adoption of this guidance will result in a reclassification of certain net benefit cost components from personnel expense to other expense on the income statement. There will be no material impact to our financial condition or results of operations.

Other income. In February 2017, the FASB issued new accounting guidance that clarifies the scope of asset derecognition guidance and accounting for partial sales of nonfinancial assets. The guidance clarifies that financial assets may be within scope of the derecognition guidance if they are promised to a counterparty in a contract and substantially all the fair value of the assets in the contract are concentrated in nonfinancial assets, which are collectively referred to as in substance nonfinancial assets. The guidance requires entities to derecognize a nonfinancial asset or in substance nonfinancial asset when a counterparty obtains controls of it and, in a partial sale transaction, when it does not have a controlling financial interest in the legal entity that holds the asset. This accounting guidance is effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us). The guidance may be applied on a retrospective or modified retrospective basis. Early adoption is permitted for interim and annual reporting periods beginning after December 15, 2016. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations.

Goodwill and other intangibles. In January 2017, the FASB issued new accounting guidance that simplifies the test for goodwill impairment by eliminating the second step of the current two-step method. Under the new guidance, entities will compare the fair value of a reporting unit with its carrying amount. If the carrying amount exceeds the reporting unit’s fair value, the entity is required to recognize an impairment charge for this amount. Current guidance requires an entity to proceed to a second step, whereby the entity would determine the fair value of its assets and liabilities. The new method applies to all reporting units. The performance of a qualitative assessment is still allowable. This accounting guidance is effective prospectively for interim and annual reporting periods beginning after December 15, 2019 (effective January 1, 2020, for us). Early adoption is permitted. The adoption of this accounting guidance is not expected to have a material effect on our financial condition or results of operations.

Business combinations. In January 2017, the FASB issued accounting guidance that clarifies the definition of a business and removes the requirement for a market participant to consider whether it could replace missing elements in an integrated set of assets and activities. The guidance states that if substantially all of the fair value of the assets acquired or disposed of is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This accounting guidance will be effective for annual and interim reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us) and should be implemented using a prospective approach. Early application is allowed for transactions for which the acquisition date occurs before the issuance date or effective date of the amendments, as long as the transaction has not been reported in financial statements that have been issued or made available for issuance, and for transactions in which a subsidiary is deconsolidated or a group of assets is derecognized that occurs before the issuance date or effective date of the amendments, as long as the transaction has not been reported in financial statements that have been issued or made available for issuance.

Statement of cash flows. In November 2016, the FASB issued accounting guidance requiring restricted cash and restricted cash equivalents to be included with other cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts presented on the statement of cash flows. This accounting guidance will be effective for annual and interim reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us) and should be implemented using a retrospective approach. Early adoption is permitted. The adoption of this accounting guidance is not expected to have a material effect on the presentation of our Consolidated Statements of Cash Flows, as Key does not hold material balances of restricted cash and restricted cash equivalents.

Income taxes. In October 2016, the FASB issued accounting guidance requiring an entity to recognize any deferred taxes from an intra-entity transfer of an asset other than inventory when the transfer occurs. This accounting guidance will be effective for annual and interim reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us) and should be implemented using a modified retrospective approach. Early adoption is permitted but only as of the beginning of an annual reporting period for which financial statements have not yet been issued. The adoption of this accounting guidance is not expected to have a material effect on our financial condition or results of operations.

Statement of cash flows. In August 2016, the FASB issued new accounting guidance that clarifies how cash receipts and cash payments in certain transactions should be presented and classified in the statement of cash flows. These specific transactions include, but are not limited to, debt prepayment or extinguishment costs, contingent considerations made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, and distributions from equity method investees. This guidance also clarifies that in instances of cash flows with multiple aspects that cannot be separately identified, classification should be based on the activity that is likely to be the predominant source of or use of cash flow. This accounting guidance will be effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us) and should be implemented using a retrospective approach. Early adoption is permitted. The adoption of this accounting guidance is not expected to have a material effect on the presentation of our Consolidated Statements of Cash Flows, as Key’s current policies are either already in-line with the clarifications in the updated guidance, or the related cash flows are not material.

Financial instruments. In June 2016, the FASB issued new accounting guidance that changes the methodology for recognizing credit losses related to financial instruments. Under current GAAP, a credit loss is not recognized until it is probable that the loss has been incurred. The new accounting guidance eliminates that threshold and expands the information required for an entity to consider when developing an estimate of expected credit losses, including the use of forecast information. Entities will be required to present financial assets measured on an amortized cost basis at the net amount that is expected to be collected. This new guidance will impact the accounting for our loans, debt securities held to maturity and available for sale, and liabilities for credit losses on unfunded lending-related commitments as well as purchased financial assets with a more-than-insignificant amount of credit deterioration since origination. This accounting guidance will be effective for interim and annual reporting periods beginning after December 15, 2019 (effective January 1, 2020, for us). Early adoption is permitted but only for interim and annual reporting periods beginning after December 15, 2018. This guidance should be implemented using a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective, except for the provisions governing purchased financial assets with credit deterioration and other-than-temporary impairment of debt securities that had been recognized before the effective date. These two provisions must be implemented prospectively. Key has formed a cross-functional implementation working group comprised of teams throughout Key, including finance and credit. The implementation team has developed a high-level project plan, is identifying and researching key interpretive issues, and is in the process of developing models that meet the requirements of the new guidance. The implementation team is also in the process of assessing forecast accuracy and potential macroeconomic factors that will be used to determine the reasonable and supportable forecast period. Key expects that the new guidance will generally result in an increase in its allowance for credit losses, as it will cover credit losses over the full remaining expected life of loans and commitments and will consider future changes in macroeconomic conditions. We are currently evaluating the extent of the increase at the adoption date.

Leases. In February 2016, the FASB issued new accounting guidance that requires a lessee to recognize a liability to make lease payments and a right-of-use asset representing its right to use an underlying asset during the lease term for both finance and operating leases. The definition of a lease was modified to exemplify the concept of control over an asset identified in the lease. Lease classification criteria remain substantially similar to criteria in current lease guidance. The guidance defines which payments can be used in determining lease classification. For short-term leases with a term of 12 months or less, lessees can make a policy election not to recognize lease assets and lease liabilities. Lessor accounting is largely unchanged. Leveraged leases that commenced before the effective date of the new guidance are grandfathered. New disclosures are required, and certain practical expedients are allowed upon adoption. This accounting and disclosure guidance will be effective for interim and annual reporting periods beginning after December 15, 2018 (effective January 1, 2019, for us) and should be implemented using the modified retrospective approach. Early adoption is permitted. Key has formed a cross-functional implementation team and has developed a high-level project plan. At December 31, 2016, Key had minimum future rental payments under noncancelable operating leases of $968 million. We are currently evaluating this operating lease population and working to identify our complete lease population, including potential embedded leases. We expect the adoption of this standard to result in additional assets and liabilities, as we will be required to recognize operating leases on our Consolidated Balance Sheet. Other implementation matters to be addressed include, but are not limited to, the determination of the effect on our financial and capital ratios and the quantification of the impact on our financial condition and results of operations.

Financial instruments. In January 2016, the FASB issued new accounting guidance that requires equity investments, except those accounted for under the equity method of accounting or consolidated, to be measured at fair value with changes recognized in net income. If there is no readily determinable fair value, the guidance allows entities the ability to measure investments at cost less impairment, whereby impairment is based on a qualitative assessment. The guidance eliminates the requirement to disclose the methods and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost and changes the presentation of financial assets and financial liabilities on the balance sheet or in the footnotes. If an entity has elected the fair value option to measure liabilities, the new accounting guidance requires the portion of the change in the fair value of a liability resulting from credit risk to be presented in OCI. This accounting and disclosure guidance will be effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us). For the provisions of the guidance that are applicable to us, the accounting will be implemented on a modified retrospective basis though a cumulative-effect adjustment to the balance sheet, except for the guidance related to equity securities without readily determinable fair values, which will be applied on a prospective basis. Except under certain instances, early adoption is not permitted. The adoption of this guidance is not expected to have a material impact on our financial condition or results of operations.

Revenue recognition. In May 2014, the FASB issued new accounting guidance that revises the criteria for determining when to recognize revenue from contracts with customers and expands disclosure requirements. The core principle is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides a five step model to be followed in making this determination. This accounting guidance can be implemented using either a retrospective method or a cumulative-effect approach. This new guidance will be effective for interim and annual reporting periods beginning after December 15, 2017 (effective January 1, 2018, for us). Early adoption is permitted but only for interim and annual reporting periods beginning after December 15, 2016. We have elected to implement this new accounting guidance using a cumulative-effect approach. We have identified the revenue line items within the scope of the new guidance and are currently finalizing our contract testing related to trust and investment services income, investment banking and debt placement fees, service charges on deposit accounts, and cards and payments income. The guidance will change our presentation of certain underwriting and credit and debit card related costs. Underwriting costs will change from a net presentation to a gross expense. Certain credit and debit card related costs will change from a gross presentation to a reduction in revenue. Additionally, we will expand our qualitative disclosures on those revenues within the scope of the new guidance. While the final assessment is still ongoing, the adoption of this accounting guidance is not expected to have a material effect on our financial condition or results of operations.