New Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Millions |
Sep. 30, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Dec. 31, 2016 |
|---|---|---|---|---|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||
| Cumulative effect of change in accounting standard - increase (decrease) | $ (15) | |||
| Total cash, cash equivalents and restricted cash | $ 387 | 59 | $ 44 | $ 30 |
| Cash and cash equivalents | 387 | 57 | ||
| Other current assets | ||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||
| Restricted cash | $ 0 | 2 | ||
| Accounting Standards Update 2014-09 | New Revenue Standard Adjustments | Retained Earnings | ||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||
| Cumulative effect of change in accounting standard - increase (decrease) | $ (29) | |||
| Accounting Standards Update 2016-16 | Retained Earnings | ||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||
| Cumulative effect of change in accounting standard - increase (decrease) | $ 15 |
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. No definition available.
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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. No definition available.
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- Definition Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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