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Business Combinations (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2020 USD ($)
Business Acquisition [Line Items] |  |
Business Combination, Consideration Transferred |  | $ 81
Distribution Relationships |  |
Business Acquisition [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 15 years |
Non-compete Agreements |  |
Business Acquisition [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 5 years |
Trade Names |  |
Business Acquisition [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 8 years |
Distribution Relationships |  |
Business Acquisition [Line Items] |  |
Finite-Lived Intangible Assets, Gross | $ 33 | 33
Non-compete Agreements |  |
Business Acquisition [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 1 | 1
Trade Names |  |
Business Acquisition [Line Items] |  |
Finite-Lived Intangible Assets, Gross | 1 | 1
Xchange |  |
Business Acquisition [Line Items] |  |
Business Combination, Consideration Transferred | 81 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | 2 | 2
BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedrResstrictedCash | 4 | 4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 36 | 36
Goodwill, Acquired During Period | 46 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets | 8 | 8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 96 | 96
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable | 8 | 8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | 8 | 8
Redeemable Noncontrolling Interest, Equity, Carrying Amount | 7 | 7
Business Acquisition, Goodwill, Expected Tax Deductible Amount | 36 | 36
2018 | 3 | 3
2019 | 3 | 3
2020 | 3 | 3
2021 | 3 | 3
2022 | 3 | 3
Thereafter | $ 22 | $ 22

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