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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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Quarterly percentage of original principal amount for quarterly amortization payments

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
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-Section S99
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