Casualty, Environmental and Other Reserves - Narrative (Details)		3 Months Ended
	Jun. 01, 2021 USD ($)	Mar. 31, 2024 USD ($) site claim	Dec. 31, 2023 USD ($)
All Contingencies Reserves [Line Items]
Total reserves		$ 448,000,000	$ 440,000,000
Casualty
All Contingencies Reserves [Line Items]
Total reserves		201,000,000	195,000,000
Self-insured retention amount, per occurrence	$ 100,000,000	$ 100,000,000
Number of individual claims expected to exceed self insured retention amount | claim		0
Environmental
All Contingencies Reserves [Line Items]
Total reserves		$ 154,000,000	154,000,000
Environmental impaired sites | site		230
Other
All Contingencies Reserves [Line Items]
Total reserves		$ 93,000,000	$ 91,000,000