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Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions | Total | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Common Stock Held in Treasury, at Cost [Member] | Noncontrolling Interest [Member] | Parent Company [Member] | Parent Company [Member] Retained Earnings [Member] | Parent Company [Member] AOCI Attributable to Parent [Member] | Parent Company [Member] Additional Paid-in Capital [Member] | Parent Company [Member] Common Stock Held in Treasury, at Cost [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2016 | $ 1,978 | $ 1,558 | $ (39) | $ 0 | $ 0 | $ 195 | $ 0 | $ 264 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Total comprehensive income (loss) | (335) | (329) | (7) | 0 | 0 | 0 | 0 | 0 | $ (335) | $ (329) | $ (7) |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | Accounting Standards Update 2018-02 [Domain] |  |  |  |  |  |  |  |  | 0 | 7 | (7) |  |
Cost of warrants acquired | 4 |  |  |  |  | 4 |  |  | 4 |  |  | $ 4 |
Issuance of common stock | (2) | (2) |  |  |  |  | 0 | 0 | (2) | (2) |  |  | $ 0
Ending balance at Dec. 31, 2017 | 1,645 | 1,234 | (52) | 0 | 0 | 200 | 0 | 264 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
Total comprehensive income (loss) | 274 | 267 | 6 | 0 | 0 | 0 | 0 | 0 | 192 | 186 | 6 |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 0 |  |  | 0 | 0 | 0 | 0 | 0 | 0 |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | Accounting Standards Update 2016-01 [Member] |  | 3 | (3) |  |  |  |  |  |  |  |  |  |
Cost of warrants acquired | 12 | 0 | 0 | 0 | 0 | 12 | 0 | 0 | 12 |  |  | 12 | 0
Issuance of common stock | (1) | (1) | 0 | 0 | 0 | 0 | 0 | 0 | (1) | (1) |  |  | 0
Ending balance at Dec. 31, 2018 | 1,633 | 1,421 | (49) | 0 | 0 | 219 | 0 | 41 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
AMPS Impact on Stockholders Equity | (297) | (82) | 0 | 0 | 0 | 8 | 0 | (223) | 8 |  |  | 8 |
Total comprehensive income (loss) | (125) | (216) | 91 | 0 | 0 | 0 | 0 | 0 | (125) | (216) | $ 91 |  |
Cost of warrants acquired | 12 | 0 | 0 | 0 | 0 | 12 | 0 | 0 | 12 |  |  | $ 12 |
Issuance of common stock | (3) | (3) | 0 | 0 | 0 | 0 | 0 | 0 | $ (3) | $ (3) |  |  | $ 0
Ending balance at Dec. 31, 2019 | 1,536 | 1,203 | 42 | 0 | 0 | 232 | 0 | 60 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |
AMPS Impact on Stockholders Equity | $ 19 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 19 |  |  |  |  |

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