Revenue from Contracts with Customers (Narrative) (Details) - USD ($) $ in Millions |
Sep. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Revenue From Contract With Customer [Abstract] | ||
| Contract with Customer, Asset, Net | $ 0 | $ 0 |
| Contract with Customer, Liability | 0 | 0 |
| Receivables & Accrued Revenues from Contracts with Customers | 764 | $ 676 |
| Revenue, Remaining Performance Obligation | $ 0 |
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount to be collected within one year of the balance sheet date (or one operating cycle, if longer) from customers in accordance with the contractual provisions of long-term contracts or programs including amounts billed and unbilled as of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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