Debt and Credit Facilities - Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	May 31, 2022	May 31, 2021
Debt Instrument [Line Items]
Long-term debt, gross	$ 6,019	$ 6,015
Adjustments for unamortized gains on interest rate swap terminations	(1)	(1)
Less: current portion	(1,313)	(1)
Long-term debt	$ 4,705	6,013
4.0% senior notes due 2024 | Senior Notes
Debt Instrument [Line Items]
Interest rate	4.00%		4.00%
Long-term debt, gross	$ 313	312
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%
Long-term debt, gross	$ 1,000	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	$ 695	694
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	$ 25	24
4.6% senior notes due 2029 | Senior Notes
Debt Instrument [Line Items]
Interest rate	4.60%
Long-term debt, gross	$ 802	803
2.3% senior notes due 2030 | Senior Notes
Debt Instrument [Line Items]
Interest rate	2.30%
Long-term debt, gross	$ 894	893
2.75% senior notes due 2031 | Senior Notes
Debt Instrument [Line Items]
Interest rate	2.75%			2.75%
Long-term debt, gross	$ 845	845
5.60% senior notes due 2032 | Senior Notes
Debt Instrument [Line Items]
Interest rate	5.60%		5.60%
Long-term debt, gross	$ 595	595
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	$ 92