Pension and Other Postretirement Benefits (Schedule of Projected and Changes in Benefit Obligations) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Projected Benefit Obligations
Actuarial (gain) / loss		$ 638
Plan Assets
Employer contributions	$ 55	271
Other Postretirement Benefits
Projected Benefit Obligations
Benefit obligations at beginning of period		163	$ 161
Service cost		1	1	$ 1
Interest cost		4	5	6
Actuarial (gain) / loss		(20)	7
Benefits paid		(10)	(11)
Foreign currency translation		(1)	0
Benefit obligations at end of period	137	137	163	161
U.S. Plans | Pension Plan
Projected Benefit Obligations
Benefit obligations at beginning of period		1,505	1,440
Service cost		20	18	15
Interest cost		25	38	50
Plan participants’ contributions		0	0
Amendments		2	1
Settlements		0	(7)
Curtailments		(10)	0
Special termination benefits		6	0
Actuarial (gain) / loss		(43)	109
Benefits paid		(92)	(94)
Foreign currency translation		0	0
Benefit obligations at end of period	1,413	1,413	1,505	1,440
Plan Assets
Balance at beginning of period		1,152	1,131
Actual return on plan assets		115	113
Employer contributions		2	9
Plan participants’ contributions		0	0
Settlements		0	(7)
Benefits paid		(92)	(94)
Foreign currency translation		0	0
Balance at end of period	1,177	1,177	1,152	1,131
Funded status	(236)	(236)	(353)
Accumulated benefit obligations at end of period	1,361	1,361	1,445
Non-U.S. Plans | Pension Plan
Projected Benefit Obligations
Benefit obligations at beginning of period		3,172	3,155
Service cost		13	10	13
Interest cost		32	52	70
Plan participants’ contributions		2	2
Amendments		(3)	0
Settlements		(2,982)	(271)
Curtailments		(7)	0
Special termination benefits		0	0
Actuarial (gain) / loss		444	276
Benefits paid		(165)	(148)
Foreign currency translation		7	96
Benefit obligations at end of period	513	513	3,172	3,155
Plan Assets
Balance at beginning of period		3,518	3,480
Actual return on plan assets		(94)	334
Employer contributions		234	18
Plan participants’ contributions		2	2
Settlements		(2,982)	(271)
Benefits paid		(165)	(152)
Foreign currency translation		16	107
Balance at end of period	529	529	3,518	$ 3,480
Funded status	16	16	346
Accumulated benefit obligations at end of period	$ 474	$ 474	$ 3,111