Employees	9 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
Employees	Employees Postretirement BenefitsThe net periodic (benefit) cost for our postretirement benefit plans was not material for the three and nine months ended September 30, 2020 or 2019. Additionally, our estimated contributions to our pension plans during 2020 have not changed significantly from amounts previously disclosed in the notes to the consolidated financial statements for the year ended December 31, 2019.