Long-Term Debt - Summary of Carrying Value of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total debt	$ 1,252	$ 1,286
Less: Debt issuance costs	(5)	(6)
Less: Unamortized discounts	(2)	(3)
Less: Current portion of debt	(364)	(197)
Total long-term debt	881	1,080
Revolving Credit Facility
Debt Instrument [Line Items]
Total debt	0	103
Term Loan A \| Loans Payable
Debt Instrument [Line Items]
Total debt	917	917
2020 Term Loan
Debt Instrument [Line Items]
Less: Debt issuance costs	(1)
2020 Term Loan \| Loans Payable
Debt Instrument [Line Items]
Total debt	100	0
Receivables Financing Facilities \| Secured Debt
Debt Instrument [Line Items]
Total debt	$ 235	$ 266

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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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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