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Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions | Total | Preferred Stock [Member] | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2017 |  | $ 0 | $ 16 | $ (1,717) | $ 17,161 | $ (8,390) | $ (59)
Beginning Balance (Shares Issued) at Dec. 31, 2017 |  | 0 | 1,621,062,898 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | $ 1,671 |  |  |  |  | 1,671 |
Cumulative Effect Of New Accounting Principles |  |  |  |  |  | (233) |
Other comprehensive income (loss), net of tax: |  |  |  |  |  |  |
Foreign currency translation adjustment | (21) |  |  |  |  |  | (21)
Net change in derivative financial instruments | 110 |  |  |  |  |  | 110
Defined benefit pensions and other items | 2 |  |  |  |  |  | 2
Stock-based compensation |  |  |  |  | 185 |  |
Stock-based compensation (Shares) |  |  | 11,085,132 |  |  |  |
Ending Balance at Dec. 31, 2018 |  | $ 0 | $ 16 | (1,717) | 17,346 | (6,953) | 33
Ending Balance (Shares Issued) at Dec. 31, 2018 |  | 0 | 1,632,148,030 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | 4,700 |  |  |  |  | 4,700 |
Other comprehensive income (loss), net of tax: |  |  |  |  |  |  |
Foreign currency translation adjustment | 195 |  |  |  |  |  | 195
Net change in derivative financial instruments | 62 |  |  |  |  |  | 62
Defined benefit pensions and other items | (20) |  |  |  |  |  | (20)
Stock-based compensation |  |  |  |  | 215 |  |
Stock-based compensation (Shares) |  |  | 10,340,881 |  |  |  |
Ending Balance at Dec. 31, 2019 | 13,877 | $ 0 | $ 16 | (1,717) | 17,561 | (2,253) | 270
Ending Balance (Shares Issued) at Dec. 31, 2019 |  | 0 | 1,642,488,911 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | (82) |  |  |  |  | (82) |
Cumulative effect adjustment for adoption of ASC 2016-13 | 10 |  |  |  |  | (10) |
Other comprehensive income (loss), net of tax: |  |  |  |  |  |  |
Foreign currency translation adjustment | 76 |  |  |  |  |  | 76
Net change in derivative financial instruments | (137) |  |  |  |  |  | (137)
Defined benefit pensions and other items | (1) |  |  |  |  |  | (1)
Stock Issuance (Par value) |  | $ 0 | $ 0 |  |  |  |
Preferred stock issuance (Value in excess of par) |  |  |  |  | 975 |  |
Common stock issuance (Value in excess of par) |  |  |  |  | 975 |  |
Stock issuance (Shares) |  | 10,062,500 | 29,382,500 |  |  |  |
Preferred stock dividends |  |  |  |  |  | (33) |
Repurchase of common stock |  |  |  | (535) |  |  |
Stock-based compensation |  |  |  |  | 221 |  |
Stock-based compensation (Shares) |  |  | 8,040,507 |  |  |  |
Ending Balance at Dec. 31, 2020 | $ 15,326 | $ 0 | $ 17 | $ (2,251) | $ 19,732 | $ (2,378) | $ 207
Ending Balance (Shares Issued) at Dec. 31, 2020 |  | 10,062,500 | 1,679,911,918 |  |  |  |

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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration