Employee Benefit Plans - Summary of Change in Assets Measured at Level 3 (Details) - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below
Fair value of plan assets at January 1	$ 93	$ 112
Actual Return on Plan Assets:
Assets held at the reporting date	4	1
Assets sold during the period	(3)	(10)
Purchases, Sales and Settlements	2	(10)
Transfers in and/or out of Level 3	108	0
Fair value of plan assets at December 31	204	93
International
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below
Fair value of plan assets at January 1	1	1
Actual Return on Plan Assets:
Assets held at the reporting date	0	0
Assets sold during the period	0	0
Purchases, Sales and Settlements	0	0
Transfers in and/or out of Level 3	0	0
Fair value of plan assets at December 31	1	1
Corporate
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below
Fair value of plan assets at January 1	0	3
Actual Return on Plan Assets:
Assets held at the reporting date	0	0
Assets sold during the period	0	0
Purchases, Sales and Settlements	0	(3)
Transfers in and/or out of Level 3	0	0
Fair value of plan assets at December 31	0	0
Bank Loans
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below
Fair value of plan assets at January 1	2	7
Actual Return on Plan Assets:
Assets held at the reporting date	0	0
Assets sold during the period	0	0
Purchases, Sales and Settlements	(2)	(5)
Transfers in and/or out of Level 3	0	0
Fair value of plan assets at December 31	0	2
Real Estate
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below
Fair value of plan assets at January 1	45	55
Actual Return on Plan Assets:
Assets held at the reporting date	0	0
Assets sold during the period	(3)	(10)
Purchases, Sales and Settlements	0	0
Transfers in and/or out of Level 3	0	0
Fair value of plan assets at December 31	42	45
Other
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below
Fair value of plan assets at January 1	45	46
Actual Return on Plan Assets:
Assets held at the reporting date	4	1
Assets sold during the period	0	0
Purchases, Sales and Settlements	4	(2)
Transfers in and/or out of Level 3	108	0
Fair value of plan assets at December 31	$ 161	$ 45