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Short And Long-Term Debt Term Loan A Facility (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Jan. 27, 2021 | Dec. 31, 2020 | Feb. 28, 2018
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | $ 3,042 |  |  |  |
Secured Debt | Term Loan A Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | $ 232 | [1] |  | $ 684 | $ 750
Secured Debt | Extended Term Loan A |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross |  |  | $ 237 |  |
Secured Debt | Extended Term Loan A | June 2021 to March 2022 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Quarterly percentage of original principal amount for quarterly amortization payments | 0.625% |  |  |  |
Secured Debt | Extended Term Loan A | June 2022 to March 2023 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Quarterly percentage of original principal amount for quarterly amortization payments | 1.25% |  |  |  |
Secured Debt | Extended Term Loan A | June 2023 to March 2024 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Quarterly percentage of original principal amount for quarterly amortization payments | 1.875% |  |  |  |
Secured Debt | Extended Term Loan A | June 2024 and thereafter |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Quarterly percentage of original principal amount for quarterly amortization payments | 2.50% |  |  |  |
[1] | See below under the header "Senior Secured Credit Agreement and Term Loan A Agreement" for additional information.

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