New Accounting Pronouncements	3 Months Ended
Mar. 31, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements Lease accounting – In February 2016, the Financial Accounting Standards Board (FASB) issued accounting guidance that revises the accounting for leases. Under the new guidance, lessees are required to recognize a right-of-use asset and a lease liability for substantially all leases. The new guidance will continue to classify leases as either financing or operating, with classification affecting the pattern of expense recognition. The accounting applied by a lessor under the new guidance will be substantially equivalent to current lease accounting guidance. The new guidance was effective January 1, 2019 and was applied using a modified retrospective approach through a cumulative effect adjustment to retained earnings as of January 1, 2019. The prior period comparative information has not been recasted and continues to be reported under the accounting guidance in effect for those periods. The new guidance provides a number of optional practical expedients in transition. We elected the "package of practical expedients," which allows us not to reassess under the new guidance our prior conclusions about lease identification, lease classification and initial direct costs. We did not elect the use-of-hindsight practical expedient. In addition, the new guidance provides practical expedients for an entity’s ongoing lessee accounting. We have elected to not separate lease and non-lease components for the majority of our asset classes. We have elected the short-term lease recognition exemption for all leases that qualify which means we will not recognize right-of-use assets or lease liabilities for these leases with a term of twelve months or less. The most significant effects of adoption relate to the recognition of right-of-use assets and lease liabilities on our balance sheet for operating leases and providing new disclosures about our leasing activities. The adoption did not have a material impact on our results of operations. In March 2019, the FASB issued accounting guidance which amended the new leasing guidance. Under these amendments, lessors that are not manufacturers or dealers will use their cost, less any discounts that may apply, as the fair value of the underlying asset, and lessors within the scope of Financial Services-Depository and Lending guidance will present all principal payments received under leases within investment activities on the statement of cash flows. We adopted the new guidance effective January 1, 2019, and the adoption did not have a material impact to our financial statements. See Note 4 for additional information. Measurement of credit losses on financial instruments – In June 2016, the FASB issued accounting guidance to introduce a new model for recognizing credit losses on financial instruments based on an estimate of current expected credit losses. The new guidance will apply to loans, accounts receivable, trade receivables, other financial assets measured at amortized cost, loan commitments and other off-balance sheet credit exposures. The new guidance will also apply to debt securities and other financial assets measured at fair value through other comprehensive income. The new guidance is effective January 1, 2020, with early adoption permitted beginning January 1, 2019. An implementation team is currently evaluating data requirements and methodologies to assess the effect of the new guidance on our financial statements. We plan to adopt the new guidance effective January 1, 2020. Derivatives and hedging – In August 2017, the FASB issued accounting guidance to better align hedge accounting with a company’s risk management activities, simplify the application of hedge accounting and improve the disclosures of hedging arrangements. The guidance was effective January 1, 2019. This presentation change was applied prospectively and did not have a material impact on our financial statements. Reclassification of certain tax effects from accumulated other comprehensive income – In February 2018, the FASB issued accounting guidance to allow a reclassification from accumulated other comprehensive income (AOCI) to retained earnings for stranded tax effects resulting from U.S. tax reform legislation. We adopted the guidance effective January 1, 2019 and the resulting reclassification was included in the period of adoption. The reclassification resulted in decreased retained earnings and increased AOCI of $97 million.

New Accounting Pronouncements

Lease accounting – In February 2016, the Financial Accounting Standards Board (FASB) issued accounting guidance that revises the accounting for leases. Under the new guidance, lessees are required to recognize a right-of-use asset and a lease liability for substantially all leases. The new guidance will continue to classify leases as either financing or operating, with classification affecting the pattern of expense recognition. The accounting applied by a lessor under the new guidance will be substantially equivalent to current lease accounting guidance. The new guidance was effective January 1, 2019 and was applied using a modified retrospective approach through a cumulative effect adjustment to retained earnings as of January 1, 2019. The prior period comparative information has not been recasted and continues to be reported under the accounting guidance in effect for those periods.

The new guidance provides a number of optional practical expedients in transition. We elected the "package of practical expedients," which allows us not to reassess under the new guidance our prior conclusions about lease identification, lease classification and initial direct costs. We did not elect the use-of-hindsight practical expedient. In addition, the new guidance provides practical expedients for an entity’s ongoing lessee accounting. We have elected to not separate lease and non-lease components for the majority of our asset classes. We have elected the short-term lease recognition exemption for all leases that qualify which means we will not recognize right-of-use assets or lease liabilities for these leases with a term of twelve months or less.

The most significant effects of adoption relate to the recognition of right-of-use assets and lease liabilities on our balance sheet for operating leases and providing new disclosures about our leasing activities. The adoption did not have a material impact on our results of operations.

In March 2019, the FASB issued accounting guidance which amended the new leasing guidance. Under these amendments, lessors that are not manufacturers or dealers will use their cost, less any discounts that may apply, as the fair value of the underlying asset, and lessors within the scope of Financial Services-Depository and Lending guidance will present all principal payments received under leases within investment activities on the statement of cash flows. We adopted the new guidance effective January 1, 2019, and the adoption did not have a material impact to our financial statements.

See Note 4 for additional information.

Measurement of credit losses on financial instruments – In June 2016, the FASB issued accounting guidance to introduce a new model for recognizing credit losses on financial instruments based on an estimate of current expected credit losses. The new guidance will apply to loans, accounts receivable, trade receivables, other financial assets measured at amortized cost, loan commitments and other off-balance sheet credit exposures. The new guidance will also apply to debt securities and other financial assets measured at fair value through other comprehensive income. The new guidance is effective January 1, 2020, with early adoption permitted beginning January 1, 2019. An implementation team is currently evaluating data requirements and methodologies to assess the effect of the new guidance on our financial statements. We plan to adopt the new guidance effective January 1, 2020.

Derivatives and hedging – In August 2017, the FASB issued accounting guidance to better align hedge accounting with a company’s risk management activities, simplify the application of hedge accounting and improve the disclosures of hedging arrangements. The guidance was effective January 1, 2019. This presentation change was applied prospectively and did not have a material impact on our financial statements.

Reclassification of certain tax effects from accumulated other comprehensive income – In February 2018, the FASB issued accounting guidance to allow a reclassification from accumulated other comprehensive income (AOCI) to retained earnings for stranded tax effects resulting from U.S. tax reform legislation. We adopted the guidance effective January 1, 2019 and the resulting reclassification was included in the period of adoption. The reclassification resulted in decreased retained earnings and increased AOCI of $97 million.