Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2016
Basis of Presentation [Abstract]
Basis of Presentation	The preparation of Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. These accounting estimates reflect the best judgment of management, but actual results could differ.
Derivatives And Hedging Activities Policy [Abstract]
Derivatives	Credco uses derivative financial instruments (derivatives) to manage exposures to various market risks. These instruments derive their value from an underlying variable or multiple variables, including interest rates and foreign exchange rates, and are carried at fair value on the Consolidated Balance Sheets.
Variable Interest Entity [Abstract]
Variable Interest Entity	Credco has established a Variable Interest Entity (VIE), American Express Canada Credit Corporation (AECCC), used primarily to lend funds to affiliates, through the issuance of notes in Canada under a medium-term note program. All notes issued under this program are fully guaranteed by Credco. Credco is considered the primary beneficiary of the entity and owns all of the outstanding voting interests and, therefore, consolidates the entity.

Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2016

The preparation of Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. These accounting estimates reflect the best judgment of management, but actual results could differ.

Derivatives And Hedging Activities Policy [Abstract]

Derivatives

Credco uses derivative financial instruments (derivatives) to manage exposures to various market risks. These instruments derive their value from an underlying variable or multiple variables, including interest rates and foreign exchange rates, and are carried at fair value on the Consolidated Balance Sheets.

Variable Interest Entity [Abstract]

Variable Interest Entity

Credco has established a Variable Interest Entity (VIE), American Express Canada Credit Corporation (AECCC), used primarily to lend funds to affiliates, through the issuance of notes in Canada under a medium-term note program. All notes issued under this program are fully guaranteed by Credco. Credco is considered the primary beneficiary of the entity and owns all of the outstanding voting interests and, therefore, consolidates the entity.