Employee Benefits (Schedule Of Fair Value Of Pension Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 562	$ 563
United States | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	282	264
United States | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	280	299
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21	21
Foreign Plan | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6	6
Foreign Plan | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15	15
Pension Plan | United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	562	563	$ 526
Pension Plan | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	21	21	$ 19
Cash and Cash Equivalents | United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash and Cash Equivalents | United States | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash and Cash Equivalents | United States | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash and Cash Equivalents | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6	6
Cash and Cash Equivalents | Foreign Plan | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6	6
Cash and Cash Equivalents | Foreign Plan | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Large-Cap Mutual Funds | United States | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	187	196
Large-Cap Mutual Funds | United States | Level 1 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	62	64
Large-Cap Mutual Funds | United States | Level 2 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	125	132
Large-Cap Mutual Funds | Foreign Plan | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
Large-Cap Mutual Funds | Foreign Plan | Level 1 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Large-Cap Mutual Funds | Foreign Plan | Level 2 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
Small-Cap Mutual Funds | United States | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14	14
Small-Cap Mutual Funds | United States | Level 1 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Small-Cap Mutual Funds | United States | Level 2 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14	14
Small-Cap Mutual Funds | Foreign Plan | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Small-Cap Mutual Funds | Foreign Plan | Level 1 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Small-Cap Mutual Funds | Foreign Plan | Level 2 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International Mutual Funds | United States | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	126	134
International Mutual Funds | United States | Level 1 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	93	84
International Mutual Funds | United States | Level 2 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	33	50
International Mutual Funds | Foreign Plan | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	6
International Mutual Funds | Foreign Plan | Level 1 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International Mutual Funds | Foreign Plan | Level 2 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4	6
Bond Mutual Funds | United States | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	226	212
Bond Mutual Funds | United States | Level 1 | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	127	116
Bond Mutual Funds | United States | Level 2 | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	99	96
Bond Mutual Funds | Foreign Plan | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9	7
Bond Mutual Funds | Foreign Plan | Level 1 | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Bond Mutual Funds | Foreign Plan | Level 2 | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9	7
Short Term Investment Funds | United States | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9	7
Short Term Investment Funds | United States | Level 1 | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Short Term Investment Funds | United States | Level 2 | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9	7
Short Term Investment Funds | Foreign Plan | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Short Term Investment Funds | Foreign Plan | Level 1 | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Short Term Investment Funds | Foreign Plan | Level 2 | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0