v3.22.1

Pension and Other Postretirement Benefits - Narrative (Details) - Pension benefits - UNITED STATES $ in Millions	1 Months Ended
	Jan. 31, 2022 plan	Jan. 31, 2021 USD ($) plan	Mar. 31, 2022 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Number Of Pension Plans | plan	2	2
Defined Benefit Plan, Plan Assets, Contributions by Employer		$ 200
Defined Benefit Plan, Funded Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Minimum Required Employer Contributions, Next Fiscal Year		183	$ 22
Defined Benefit Plan, Employer Contribution, Additional Contribution Above Minimum Requirement		$ 17

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