Revenue from Contracts with Customers (In-Text) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Receivables for revenue from contracts with customers	$ 656	$ 644
Financial planning fees [Member]
Disaggregation of Revenue [Line Items]
Contract liabilities	136	138
Capitalized contract costs	110	112
Transaction and other fees [Member]
Disaggregation of Revenue [Line Items]
Contract liabilities	$ 47	$ 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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-SubTopic 40
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- Definition

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

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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