Other Postretirement Benefit Plans - Narrative (Details)	1 Months Ended		3 Months Ended					12 Months Ended
	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2023	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Actuarial gains			$ 12,300,000	$ (11,600,000)	$ 8,000,000	$ (3,900,000)	$ (3,500,000)
Postretirement Plan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Recognition of net actuarial (gains) losses									$ 13,100,000	$ 4,100,000	$ (1,400,000)
Discount rate (as a percent)			5.75%		2.99%				5.75%	2.99%	2.62%	3.43%
Actuarial gains									$ 13,100,000	$ 4,100,000
Discount rate (as a percent)									2.99%	2.62%	3.43%
Current liabilities			$ 4,100,000		$ 5,300,000				$ 4,100,000	$ 5,300,000
Weighted average annual rate of increase in per capita cost for medical benefits (as a percent)									6.50%
Weighted average annual rate of increase in per capita cost for medical benefits declining gradually (as a percent)									5.00%
Annual initial increase for prescription drug benefits and HMO benefits per year									$ 5
Weighted average annual rate of secondary increase for prescription drug benefits and HMO benefits (as a percent)									6.00%
Weighted average annual rate of increase in per capita for prescription drug benefits and HMO benefits declining (as a percent)									5.00%
Net periodic benefit cost	$ 11,100,000	$ 50,000,000
Expected future benefit payment, remainder of fiscal year	$ 4,000,000
Postretirement Plan | Discount Rate in Basis Points
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Increase (decrease) to discount rate (basis points)									0.0276	0.0037	(0.0081)
Postretirement Plan | Discount Rate in Dollars
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Recognition of net actuarial (gains) losses									$ 8,400,000	$ 1,600,000	$ (3,900,000)
Postretirement Plan | Return on Plan Assets vs. Expectation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Recognition of net actuarial (gains) losses									1,900,000	1,000,000	400,000
Actuarial gains									3,000,000	1,100,000	2,000,000
Postretirement Plan | Other Valuation Assumptions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Recognition of net actuarial (gains) losses									$ 200,000	$ 400,000	$ 100,000
Postretirement Plan | Forecast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate (as a percent)								5.75%