Claims, Lawsuits, and Other Contingencies - Legal Narrative (Details) - Fatal Plain Crash In November2016 - Pending Litigation £ in Millions, $ in Millions		1 Months Ended				3 Months Ended
	Dec. 31, 2023 USD ($)	Apr. 30, 2021 GBP (£) plaintiff	Aug. 31, 2020 USD ($) plaintiff	Nov. 30, 2019 USD ($) defendant	Nov. 30, 2018 USD ($)	Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Value of damages sought	$ 36.9	£ 29	$ 844.0		$ 16.0
Loss contingency, number of defendants | defendant				3
Damages sought option 1				$ 300.0
Damages sought option 2				50.0
Damages sought option 3				$ 25.0
Loss contingency, number of plaintiffs | plaintiff		16	43
Legal settlement expense						$ 197.0