Debt and Credit Agreements - Schedule of Debt (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Net premium (discount)	$ 175	$ 185
Unamortized debt issuance costs	(9)	(9)
Long-term debt	3,115	3,125
Current portion of long-term debt	$ 25	0
6.51% weighted-average private placement senior notes
Debt Instrument [Line Items]
Weighted average interest rate	6.51%
Total debt	$ 37	37
5.58% weighted-average senior notes
Debt Instrument [Line Items]
Weighted average interest rate	5.58%
Total debt	$ 87	87
3.65% weighted-average private placement senior notes
Debt Instrument [Line Items]
Weighted average interest rate	3.65%
Total debt	$ 825	825
4.375% senior notes due June 1, 2024
Debt Instrument [Line Items]
Stated percentage	4.375%
Total debt	$ 750	750
3.90% senior notes due May 15, 2027
Debt Instrument [Line Items]
Stated percentage	3.90%
Total debt	$ 750	750
4.375% senior notes due March 15, 2029
Debt Instrument [Line Items]
Stated percentage	4.375%
Total debt	$ 500	500
Revolving credit facility
Debt Instrument [Line Items]
Total debt	$ 0	$ 0

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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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after accumulated amortization, of debt discount (premium).

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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. 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 current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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