Revenue from Contracts with Customers (In-Text) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Receivables for revenue from contracts with customers	$ 689	$ 644
Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Contract liabilities	131	138
Capitalized contract costs	107	112
Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Contract liabilities	$ 31	$ 0

For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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- Definition

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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