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Contingencies, Commitments and Guarantees (Details) - Guarantees
$ in Millions
Jun. 30, 2020
USD ($)
Indemnifications related to the sale of businesses [Member]  
Guarantor obligations  
Maximum amount of contingent obligation $ 351
Guarantees of certain insurance policy obligations [Member]  
Guarantor obligations  
Maximum amount of contingent obligation 480
Amount indemnified by a third party $ 480