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Stockholders' Equity - Common Stock Repurchased (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 28, 2021 | Mar. 10, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Equity [Abstract] |  |  |  |  |
Common stock repurchased (in shares) | 13,000,000 | 45,000,000 | 98,748,905 | 47,736,847 | 16,962,199
Average purchase price per share (in dollars per share) |  |  | $ 17.37 | $ 9.66 | $ 9.86
Shares repurchased related to employee stock-based compensation plans (in shares) |  |  | 1,368,942 | 1,197,843 | 1,369,630
Average purchase price per share (in dollars per share) |  |  | $ 14.70 | $ 10.93 | $ 10.85
Common shares issued (in shares) |  |  | 3,786,581 | 3,129,325 | 3,743,705
Shares related to settlement of common stock tender offer |  |  | 28,500,000 |  |
2021 Share Repurchase Program |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Remaining capacity |  |  | $ 38 |  |

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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + 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=123467817&loc=d3e21463-112644 Reference 2: 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=120391452&loc=d3e13212-122682 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 Reference 4: 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(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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