Fair Values of Financial Instruments - Implied Market Rates of Interest (Details) - Valuation, Market Approach - Level 2 - Measurement Input, Implied Market Rate	Mar. 31, 2024	Dec. 31, 2023
3.95% Senior Notes Due 2028
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0555	0.0579
5.15% Senior Notes Due 2029
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0560	0.0610
7.15% Senior Notes Due 2033
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0609	0.0628
Equipment Loans Due 2025
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.0567	0.0536