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Consolidated Statements of Changes in Stockholders' Equity Consolidated Statement of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Millions | Total | Stockholders' Equity, Total [Member] | Common Stocks | Preferred Stock | Additional Paid-in Capital | Retained Earnings | Treasury Stock, at Cost | Accumulated Other Comprehensive Loss, net of tax
--- | --- | --- | --- | --- | --- | --- | --- | ---
Preferred Stock, Value, Outstanding |  |  |  | $ 556 |  |  |  |
Additional Paid in Capital |  |  |  |  | $ 10,038 |  |  |
Treasury Stock, Value |  |  |  |  |  |  | $ (1,740) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | $ 2,843 |  |  |  |  |  |  | $ 2,843
Adjustments to Additional Paid in Capital, Increase in Carrying Amount of Redeemable Preferred Stock |  |  |  | 556 |  |  |  |
Payments for Repurchase of Warrants | (33) |  |  |  | (33) |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  |  |  | (556) |  |  |
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs | (634) |  |  |  |  |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities |  |  | 21,178,000 |  |  |  |  |
Balance at beginning of period at Dec. 31, 2012 |  |  |  |  |  | $ 10,745 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Issuance of shares under incentive and stock compensation plans |  |  |  |  | 105 |  |  |
Allocated Share-based Compensation Expense | 69 |  |  |  |  |  |  |
Tax expense on employee stock options and awards |  |  |  |  | 3 |  |  |
Net Income (Loss) Attributable to Parent | 176 |  |  |  |  | 176 |  |
Dividends on preferred stock |  |  |  |  |  | (10) |  |
Dividends declared on common stock |  |  |  |  |  | (228) |  |
Treasury stock acquired |  |  |  |  |  |  | 600 |
Issuance of shares under incentive and stock compensation plans from treasury stock |  |  |  |  |  |  | 125 |
Return of shares under incentive and stock compensation plans to treasury stock | (20) |  |  |  |  |  | (17) |
Total other comprehensive income | (2,922) |  |  |  |  |  |  | (2,922)
Balance at end of period at Dec. 31, 2013 |  | $ 18,905 |  |  |  | 10,683 |  |
Common Shares Outstanding, at beginning of period at Dec. 31, 2012 |  |  | 436,306,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Treasury stock acquired |  |  | (19,235,000) |  |  |  |  |
Issuance of shares under incentive and stock compensation plans |  |  | 2,136,000 |  |  |  |  |
Return of shares under incentive and stock compensation plans and other to treasury stock |  |  | (592,000) |  |  |  |  |
Common Shares Outstanding, at end of period at Dec. 31, 2013 |  |  | 453,290,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Stock Issued, Own-share Lending Arrangement, Issuance Costs | 634 |  |  |  |  |  |  |
Stock Issued During Period, Shares, Warrant Exercised |  |  | 13,497,000 |  |  |  |  |
Preferred Stock, Value, Outstanding |  |  |  | 0 |  |  |  |
Common Stock, Value, Issued |  |  | $ 5 |  |  |  |  |
Additional Paid in Capital |  |  |  |  | 9,894 |  |  |
Treasury Stock, Value |  |  |  |  |  |  | (1,598) |
Retained Earnings (Accumulated Deficit) |  |  |  |  |  | 10,683 |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (79) |  |  |  |  |  |  | (79)
Adjustments to Additional Paid in Capital, Increase in Carrying Amount of Redeemable Preferred Stock |  |  |  | 0 |  |  |  |
Payments for Repurchase of Warrants |  |  |  |  | 0 |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  |  |  | 0 |  |  |
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs |  |  |  |  | (801) |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities |  |  | 0 |  |  |  |  |
Issuance of shares under incentive and stock compensation plans |  |  |  |  | 64 |  |  |
Allocated Share-based Compensation Expense | 98 |  |  |  | 88 |  |  |
Tax expense on employee stock options and awards |  |  |  |  | 6 |  |  |
Net Income (Loss) Attributable to Parent | 798 |  |  |  |  | 798 |  |
Dividends on preferred stock |  |  |  |  |  | 0 |  |
Dividends declared on common stock |  |  |  |  |  | (290) |  |
Treasury stock acquired |  |  |  |  |  |  | 1,796 |
Issuance of shares under incentive and stock compensation plans from treasury stock |  |  |  |  |  |  | 82 |
Return of shares under incentive and stock compensation plans to treasury stock | (30) |  |  |  |  |  | (16) |
Total other comprehensive income | 1,007 |  |  |  |  |  |  | 1,007
Balance at end of period at Dec. 31, 2014 | 18,720 | 18,720 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Treasury stock acquired |  |  | (49,518,000) |  |  |  |  |
Issuance of shares under incentive and stock compensation plans |  |  | 2,003,000 |  |  |  |  |
Return of shares under incentive and stock compensation plans and other to treasury stock |  |  | (439,000) |  |  |  |  |
Common Shares Outstanding, at end of period at Dec. 31, 2014 |  |  | 424,416,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Stock Issued, Own-share Lending Arrangement, Issuance Costs |  |  |  |  |  |  | 801 |
Stock Issued During Period, Shares, Warrant Exercised |  |  | 19,080,000 |  |  |  |  |
Preferred Stock, Value, Outstanding |  |  |  | 0 |  |  |  |
Common Stock, Value, Issued | 5 |  | $ 5 |  |  |  |  |
Additional Paid in Capital | 9,123 |  |  |  | 9,123 |  |  |
Treasury Stock, Value | (2,527) |  |  |  |  |  | (2,527) |
Retained Earnings (Accumulated Deficit) | 11,191 |  |  |  |  | 11,191 |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | 928 |  |  |  |  |  |  | 928
Adjustments to Additional Paid in Capital, Increase in Carrying Amount of Redeemable Preferred Stock |  |  |  | 0 |  |  |  |
Payments for Repurchase of Warrants | 0 |  |  |  | 0 |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  |  |  | 0 |  |  |
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs |  |  |  |  | (90) |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities |  |  | 0 |  |  |  |  |
Issuance of shares under incentive and stock compensation plans |  |  |  |  | 165 |  |  |
Allocated Share-based Compensation Expense | 78 |  |  |  | 78 |  |  |
Tax expense on employee stock options and awards |  |  |  |  | 27 |  |  |
Net Income (Loss) Attributable to Parent | 1,682 |  |  |  |  | 1,682 |  |
Dividends on preferred stock |  |  |  |  |  | 0 |  |
Dividends declared on common stock |  |  |  |  |  | (323) |  |
Treasury stock acquired |  |  |  |  |  |  | 1,250 |
Issuance of shares under incentive and stock compensation plans from treasury stock |  |  |  |  |  |  | 184 |
Return of shares under incentive and stock compensation plans to treasury stock | (42) |  |  |  |  |  | (54) |
Total other comprehensive income | (1,257) |  |  |  |  |  |  | (1,257)
Balance at end of period at Dec. 31, 2015 | 17,642 | $ 17,642 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Treasury stock acquired |  |  | (28,431,000) |  |  |  |  |
Issuance of shares under incentive and stock compensation plans |  |  | 4,877,000 |  |  |  |  |
Return of shares under incentive and stock compensation plans and other to treasury stock |  |  | (1,311,000) |  |  |  |  |
Common Shares Outstanding, at end of period at Dec. 31, 2015 |  |  | 401,821,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Stock Issued, Own-share Lending Arrangement, Issuance Costs |  |  |  |  |  |  | 90 |
Stock Issued During Period, Shares, Warrant Exercised |  |  | 2,270,000 |  |  |  |  |
Preferred Stock, Value, Outstanding |  |  |  | $ 0 |  |  |  |
Common Stock, Value, Issued | 5 |  | $ 5 |  |  |  |  |
Additional Paid in Capital | 8,973 |  |  |  | $ 8,973 |  |  |
Treasury Stock, Value | (3,557) |  |  |  |  |  | $ (3,557) |
Retained Earnings (Accumulated Deficit) | 12,550 |  |  |  |  | $ 12,550 |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | $ (329) |  |  |  |  |  |  | $ (329)

X
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. + 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 + Details
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