Customer Deposits (Details 2) $ in Millions	Sep. 30, 2020 USD ($)
Time Deposits By Maturity
2020	$ 1,615
2021	3,749
2022	3,014
2023	644
2024	274
After 5 years	204
Total	9,500
United States [Member]
Time Deposits By Maturity
2020	1,612
2021	3,744
2022	3,013
2023	644
2024	274
After 5 years	204
Total	9,491
Non-US [Member]
Time Deposits By Maturity
2020	3
2021	5
2022	1
2023	0
2024	0
After 5 years	0
Total	$ 9

Amount of time deposit maturing after fifth fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit maturing in remainder of current fiscal year. Time deposit includes, but is not limited to, certificate of deposit.

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Amount of time deposit maturing in fourth fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit maturing in next fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit maturing in third fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit maturing in second fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit liabilities, including certificates of deposit.

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