Debt and Credit Agreements - Schedule of Debt (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Net premium (discount)	$ 164,000,000	$ 185,000,000
Unamortized debt issuance costs	(8,000,000)	(9,000,000)
Long-term debt	3,105,000,000	3,125,000,000
Current portion of long-term debt	$ 124,000,000	0
6.51% weighted-average private placement senior notes
Debt Instrument [Line Items]
Weighted average interest rate	6.51%
Total debt	$ 37,000,000	37,000,000
Current portion of long-term debt	$ 37,000,000
5.58% weighted-average senior notes
Debt Instrument [Line Items]
Weighted average interest rate	5.58%
Total debt	$ 87,000,000	87,000,000
Current portion of long-term debt	$ 87,000,000
3.65% weighted-average private placement senior notes
Debt Instrument [Line Items]
Weighted average interest rate	3.65%
Total debt	$ 825,000,000	825,000,000
4.375% senior notes due June 1, 2024
Debt Instrument [Line Items]
Stated percentage	4.375%
Total debt	$ 750,000,000	750,000,000
3.90% senior notes due May 15, 2027
Debt Instrument [Line Items]
Stated percentage	3.90%
Total debt	$ 750,000,000	750,000,000
4.375% senior notes due March 15, 2029
Debt Instrument [Line Items]
Stated percentage	4.375%
Total debt	$ 500,000,000	500,000,000
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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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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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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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