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Stockholders' Equity - Common Stock Repurchased (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Equity [Abstract] |  |  |  |
Common stock repurchased (in shares) | 16,389,696 | 19,997,008 | 16,389,696 | 29,530,400
Average purchase price per share (in dollars per share) | $ 15.71 | $ 18.01 | $ 15.71 | $ 18.15
Shares repurchased related to employee stock-based compensation plans (in shares) | 128,212 | 196,301 | 1,077,643 | 1,130,903
Average purchase price per share (in dollars per share) | $ 14.64 | $ 17.45 | $ 15.44 | $ 18.36
Common shares issued (in shares) | 349,009 | 493,893 | 2,872,753 | 3,088,710
Remaining authority under the share repurchase program | $ 326 |  | $ 326 |

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