Recent Accounting Pronouncements	3 Months Ended
Apr. 30, 2019
Accounting Changes And Error Corrections [Abstract]
Recent Accounting Pronouncements	2. Recent Accounting Pronouncements Recently Adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update that amends the existing accounting standards for lease accounting. This update requires lessees to recognize a right-of-use asset and lease liability for both operating and finance leases. The Company adopted the new guidance on February 1, 2019 using a modified retrospective approach at the beginning of the period of adoption. The Company elected the “package of three” practical expedients and did not reassess expired or existing leases as of the effective date. The Company also elected the practical expedient to not separate non-lease components from lease components as it pertains to real estate leases. Adoption on February 1, 2019 resulted in the recognition of approximately $1.3 billion of lease liabilities based on the present value of the remaining minimum rental payments using discount rates as of the effective date. Corresponding right-of-use assets of approximately $1.1 billion were recognized, with the offsetting balance representing a reduction in the previously recognized deferred rent balance. Adoption did not result in a material impact on the Company’s Consolidated Statements of Income or Consolidated Statements of Cash Flows. Recently Issued In June 2016, the FASB issued an accounting standards update that introduces a new model for recognizing credit losses on financial instruments based on an estimate of current expected credit losses. This includes loan commitments, accounts receivable, trade receivables and certain off-balance sheet credit exposures. The guidance also modifies the impairment model for available-for-sale debt securities. The update will be effective for the Company on February 1, 2020 and early adoption is permitted. The Company has concluded that this update will not have a material impact on its consolidated financial statements and related disclosures.

Recent Accounting Pronouncements

3 Months Ended

Apr. 30, 2019

Accounting Changes And Error Corrections [Abstract]

2. Recent Accounting Pronouncements

Recently Adopted

In February 2016, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update that amends the existing accounting standards for lease accounting. This update requires lessees to recognize a right-of-use asset and lease liability for both operating and finance leases. The Company adopted the new guidance on February 1, 2019 using a modified retrospective approach at the beginning of the period of adoption. The Company elected the “package of three” practical expedients and did not reassess expired or existing leases as of the effective date. The Company also elected the practical expedient to not separate non-lease components from lease components as it pertains to real estate leases. Adoption on February 1, 2019 resulted in the recognition of approximately $1.3 billion of lease liabilities based on the present value of the remaining minimum rental payments using discount rates as of the effective date. Corresponding right-of-use assets of approximately $1.1 billion were recognized, with the offsetting balance representing a reduction in the previously recognized deferred rent balance. Adoption did not result in a material impact on the Company’s Consolidated Statements of Income or Consolidated Statements of Cash Flows.

Recently Issued

In June 2016, the FASB issued an accounting standards update that introduces a new model for recognizing credit losses on financial instruments based on an estimate of current expected credit losses. This includes loan commitments, accounts receivable, trade receivables and certain off-balance sheet credit exposures. The guidance also modifies the impairment model for available-for-sale debt securities. The update will be effective for the Company on February 1, 2020 and early adoption is permitted. The Company has concluded that this update will not have a material impact on its consolidated financial statements and related disclosures.