Debt (Maturity of debt) (Details) $ in Millions	Dec. 31, 2023 USD ($)
Debt Disclosure [Abstract]
2024	$ 550
2025	0
2026	500
2027	500
2028	0
Thereafter	1,500
Less: discount	(19)
Total	$ 3,031

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

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