Employee Benefits - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Pre-Medicare company contribution for retiree medical coverage, maximum percent	4.00%
Defined benefit plan, expected contributions during the remaining of fiscal year	$ 1,300
Contribution to other post retirement plans	46
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, contributions by employer to employee pension plan	463
Pension Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, contributions by employer to employee pension plan	431
Defined benefit plan, expected contributions during the remaining of fiscal year	1,100
Pension Benefits | International
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions during the remaining of fiscal year	200
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected contributions during the remaining of fiscal year	$ 150