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Debt and Credit Facilities - Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Sep. 05, 2019
Debt Instrument [Line Items]
Long-term debt, gross	$ 5,998	$ 6,019
Adjustments for unamortized gains on interest rate swap terminations	(1)	(1)
Less: current portion	(322)	(1,313)
Long-term debt	$ 5,675	4,705
4.0% senior notes due 2024 | Senior Notes
Debt Instrument [Line Items]
Interest rate	4.00%
Long-term debt, gross	$ 0	$ 313
1.75% senior convertible notes due 2024 | Senior Notes
Debt Instrument [Line Items]
Interest rate	1.75%
1.75% senior convertible notes due 2024 | Convertible Debt
Debt Instrument [Line Items]
Interest rate	1.75%	1.75%	1.75%	1.75%
Long-term debt, gross	$ 0	$ 1,000
6.5% debentures due 2025 | Senior Notes
Debt Instrument [Line Items]
Interest rate	6.50%
6.5% debentures due 2025 | Debenture
Debt Instrument [Line Items]
Long-term debt, gross	$ 70	70
7.5% debentures due 2025 | Senior Notes
Debt Instrument [Line Items]
Interest rate	7.50%
7.5% debentures due 2025 | Debenture
Debt Instrument [Line Items]
Long-term debt, gross	$ 252	252
4.6% senior notes due 2028 | Senior Notes
Debt Instrument [Line Items]
Interest rate	4.60%
Long-term debt, gross	$ 696	695
6.5% debentures due 2028 | Senior Notes
Debt Instrument [Line Items]
Interest rate	6.50%
6.5% debentures due 2028 | Debenture
Debt Instrument [Line Items]
Long-term debt, gross	$ 24	25
5.0% senior notes due 2029 | Senior Notes
Debt Instrument [Line Items]
Interest rate	5.00%
5.0% senior notes due 2029 | Debenture
Debt Instrument [Line Items]
Long-term debt, gross	$ 396	0
4.6% senior notes due 2029 | Senior Notes
Debt Instrument [Line Items]
Interest rate	4.60%
Long-term debt, gross	$ 802	802
2.3% senior notes due 2030 | Senior Notes
Debt Instrument [Line Items]
Interest rate	2.30%
Long-term debt, gross	$ 895	894
2.75% senior notes due 2031 | Senior Notes
Debt Instrument [Line Items]
Interest rate	2.75%
Long-term debt, gross	$ 846	845
5.6% senior notes due 2032 | Senior Notes
Debt Instrument [Line Items]
Interest rate	5.60%
Long-term debt, gross	$ 596	595
5.4% senior notes due 2034 | Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 893	0
6.625% senior notes due 2037 | Senior Notes
Debt Instrument [Line Items]
Interest rate	6.625%
Long-term debt, gross	$ 38	38
5.5% senior notes due 2044 | Senior Notes
Debt Instrument [Line Items]
Interest rate	5.50%
Long-term debt, gross	$ 397	397
5.22% debentures due 2097 | Senior Notes
Debt Instrument [Line Items]
Interest rate	5.22%
5.22% debentures due 2097 | Debenture
Debt Instrument [Line Items]
Long-term debt, gross	$ 93	$ 93

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