Pension Benefit Plans (Funded Status Of Pension Plans) (Details) - Pension benefit plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in benefit obligation:
Service cost	$ 40	$ 31	$ 32
Change in plan assets:
Fair value of plan assets at beginning of year	3,004
Fair value of plan assets at end of year	3,456	3,004
U.S. Pension Benefits
Change in benefit obligation:
Benefit obligation at beginning of year	(2,468)	(2,340)
Service cost	0	6
Interest cost	69	89
Employee contributions	0	0
Benefits and other expenses paid	165	164
Acquisitions and other	96	0
Actuarial loss	273	237
Amendments, settlements and curtailments	23	40
Foreign exchange rate impact	0	0
Benefit obligation at end of year	(2,718)	(2,468)	(2,340)
Change in plan assets:
Fair value of plan assets at beginning of year	1,866	1,778
Actual return on plan assets	227	283
Employer contributions	140	10
Employee contributions	0	0
Amendments and settlements	22	41
Benefits and other expenses paid	165	164
Acquisitions and other	79	0
Foreign exchange rate impact	0	0
Fair value of plan assets at end of year	2,125	1,866	1,778
Funded status	(593)	(602)
Non-U.S. Pension Benefits
Change in benefit obligation:
Benefit obligation at beginning of year	(1,446)	(1,315)
Service cost	40	25
Interest cost	22	24
Employee contributions	6	5
Benefits and other expenses paid	59	48
Acquisitions and other	436	0
Actuarial loss	106	152
Amendments, settlements and curtailments	4	47
Foreign exchange rate impact	168	20
Benefit obligation at end of year	(2,161)	(1,446)	(1,315)
Change in plan assets:
Fair value of plan assets at beginning of year	1,138	1,032
Actual return on plan assets	104	115
Employer contributions	51	44
Employee contributions	6	5
Amendments and settlements	7	37
Benefits and other expenses paid	59	48
Acquisitions and other	30	0
Foreign exchange rate impact	68	27
Fair value of plan assets at end of year	1,331	1,138	$ 1,032
Funded status	$ (830)	$ (308)