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Debt - Narrative (Details) - USD ($) $ in Millions	Sep. 01, 2021	Jun. 16, 2021	May 17, 2021	May 12, 2021
7.25% 2063 Senior Notes
Debt Instrument [Line Items]
Amount redeemed				$ 275
Interest rate				7.25%
Unamortized debt issuance costs				$ 9
Redemption price rate				100.00%
5.5% 2070 Senior Notes
Debt Instrument [Line Items]
Interest rate			5.50%
Redemption price rate			100.00%
Principal amount			$ 500
Long-term Debt			484
Debt issuance costs			$ 16
7.25% 2064 Senior Notes
Debt Instrument [Line Items]
Amount redeemed		$ 300
Interest rate		7.25%
Unamortized debt issuance costs		$ 10
Redemption price rate		100.00%
6.95% Senior Notes
Debt Instrument [Line Items]
Amount redeemed	$ 342
Interest rate	6.95%
Unamortized debt issuance costs	$ 11
Redemption price rate	100.00%

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

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