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Condensed Consolidated Statements of Shareholders' Equity (Parentheticals) - USD ($) shares in Millions, $ in Millions | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | --- | --- | ---
Treasury Shares Held in Trust (in shares) | 1 | 1 | 1 | 1 | 1 | 1
Treasury shares held in trust value | $ 29 | $ 29 | $ 29 | $ 31 | $ 31 | $ 31
Common stock par value | $ 17 | $ 17 | $ 17 | 17 | $ 17 | $ 17
Accounting Standards Update 2014-09 |  |  |  |  |  |
Adoption of new accounting standard |  |  |  | 13 |  |
Accounting Standards Update 2018-02 |  |  |  |  |  |
Adoption of new accounting standard |  |  |  | $ 7 |  |

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- Definition Treasury Stock, Shares, Held in Trust + References No definition available. + Details
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- Definition Treasury Stock, Value, Shares Held In Trust + References No definition available. + Details
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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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. + References No definition available. + Details
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