Casualty, Environmental and Other Reserves - Narrative (Details)	Jun. 01, 2021 USD ($)	May 31, 2021 USD ($)	Dec. 31, 2022 USD ($) claim	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Reserves			$ 436,000,000	$ 368,000,000	$ 314,000,000	$ 305,000,000
Casualty Reserves
Loss Contingencies [Line Items]
Reserves			$ 194,000,000	180,000,000	196,000,000	187,000,000
Self-insured retention amount per injury	$ 100,000,000	$ 75,000,000
Individual claims expected to exceed self-insured retention amount | claim			0
Environmental
Loss Contingencies [Line Items]
Reserves			$ 161,000,000	108,000,000	76,000,000	74,000,000
Other
Loss Contingencies [Line Items]
Reserves			$ 81,000,000	$ 80,000,000	$ 42,000,000	$ 44,000,000