Casualty, Environmental and Other Reserves - Narrative (Details)			6 Months Ended
	Jun. 01, 2021 USD ($)	May 31, 2021 USD ($)	Jun. 30, 2022 USD ($) site claim	Dec. 31, 2021 USD ($)
All Contingencies Reserves [Line Items]
Total reserves			$ 403,000,000	$ 368,000,000
Casualty
All Contingencies Reserves [Line Items]
Total reserves			188,000,000	180,000,000
Self-insured retention amount, per occurrence	$ 100,000,000	$ 75,000,000	$ 100,000,000
Number of individual claims expected to exceed self insured retention amount | claim			0
Environmental
All Contingencies Reserves [Line Items]
Total reserves			$ 133,000,000	108,000,000
Environmental impaired sites | site			230
Other
All Contingencies Reserves [Line Items]
Total reserves			$ 82,000,000	$ 80,000,000