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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Stockholders' Equity Attributable to Parent | $ (1,459) |
Common Stock [Member] |  |
Stockholders' Equity Attributable to Parent | 9 | $ 7
Preferred Stock [Member] |  |
Stockholders' Equity Attributable to Parent | 1,671 | 3,036
Additional Paid-in Capital [Member] |  |
Stockholders' Equity Attributable to Parent | 14,439 | 12,521
Treasury Stock - Common [Member] |  |
Stockholders' Equity Attributable to Parent | $ (33) | $ (31)
Purchase of shares for company benefit plans, shares | 1,185,517 | 10,100
Release of shares from company benefit plans, shares | 38,013 | 63,318
Preferred Stock, Exchanged for Shares of Common Stock [Member] | Common Stock [Member] |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities | 9,966,000 | 1,022,000
Preferred Stock, Exchanged for Shares of Common Stock [Member] | Preferred Stock [Member] |  |
Conversion of Stock, Shares Converted | 236,048 | 25,802
Preferred Stock, Exchanged for Shares of Common Stock [Member] | Additional Paid-in Capital [Member] |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities | 9,965,835 | 1,021,506
Contingent Convertible Senior Notes Exchanged for Shares of Common Stock [Member] | Common Stock [Member] |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities | 0 | 14,699,000
Contingent Convertible Senior Notes Exchanged for Shares of Common Stock [Member] | Additional Paid-in Capital [Member] |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities | 0 | 14,699,368
Senior Notes Exchanged for Shares of Common Stock [Member] | Common Stock [Member] |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities | 0 | 2,556,000
Senior Notes Exchanged for Shares of Common Stock [Member] | Additional Paid-in Capital [Member] |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities | 0 | 2,555,979

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- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -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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