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Basis of Presentation and Significant Accounting Policies Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Derivative [Line Items] |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | $ 62,000,000 |  | $ 62,000,000 |  | $ 60,000,000 |
Preferred Stock, Shares Issued | 0 |  | 0 |  |  |
Redeemable Noncontrolling Interest, Equity, Carrying Amount | $ 18,000,000 | $ 20,000,000 | $ 18,000,000 | $ 20,000,000 | $ 18,000,000 | $ 7,000,000
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest |  |  | 0 | 0 |  |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest |  | 0 | 0 | 0 |  |
Noncontrolling Interest, Change in Redemption Value | 0 | (1,000,000) | $ 0 | $ (14,000,000) |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  | 80.00% |
Business Combination, Redeemable Noncontrolling Percentage |  |  |  |  | 20.00% |
Number of Variable Interest Entities Consolidated During the Period |  |  | 2 | 0 |  |
Temporary Equity, Accretion to Redemption Value, Adjustment |  |  | $ 0 | $ 14,000,000 |  |
Xchange |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Carrying Amount |  |  |  |  | $ 18,000,000 |
Redeemable Noncontrolling Interest, Equity, Redemption Value | $ 18,000,000 |  | $ 18,000,000 |  |  |
Retained Earnings [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Noncontrolling Interest, Change in Redemption Value |  | $ (1,000,000) |  | $ (14,000,000) |  |

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