Employee Benefit Plans (Changes In Defined Benefit Obligation And Fair Value Of Defined Benefit Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning	$ 2,337
Fair value of plan assets, ending	1,742	$ 2,337
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation, beginning	3,014	2,650
Service cost	64	61	$ 58
Interest cost	48	70	82
Actuarial loss (gain)	(152)	285
Employee contributions	2	2
Settlements	(715)	(17)
Benefits paid	(51)	(84)
Foreign currency effects	(32)	47
Benefit obligation, ending	2,178	3,014	2,650
Fair value of plan assets, beginning	2,337	2,018
Actual return on plan assets	146	317
Employer contributions	30	85
Employee contributions	2	2
Settlements	(715)	(18)
Benefits Paid	(51)	(84)
Foreign currency effects	(7)	17
Fair value of plan assets, ending	1,742	2,337	2,018
Funded status	(436)	(677)
Prepaid benefit cost	121	29
Accrued benefit liability - current	(18)	(19)
Accrued benefit liability - long-term	(539)	(687)
Net amount recognized in the balance sheet	(436)	(677)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation, beginning	173	167
Service cost	1	1	2
Interest cost	2	4	5
Actuarial loss (gain)	(5)	17
Settlements	0	0
Benefits paid	(17)	(14)
Foreign currency effects	0	(2)
Benefit obligation, ending	154	173	$ 167
Fair value of plan assets, beginning	0
Employer contributions	17	14
Benefits Paid	(17)	(14)
Fair value of plan assets, ending	0	0
Funded status	(154)	(173)
Accrued benefit liability - current	(15)	(16)
Accrued benefit liability - long-term	(139)	(157)
Net amount recognized in the balance sheet	$ (154)	$ (173)