Income Taxes (Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Accrued expenses not currently deductible	$ 492	$ 526
Differences related to non-U.S. operations	324	170
Accrued U.S. retirement benefits	438	406
Net operating losses	70	48
Income currently recognized for tax	19	20
Other	27	16
Deferred tax assets	1,370	1,186
Deferred tax liabilities:
Differences related to non-U.S. operations	400	287
Depreciation and amortization	594	342
Accrued retirement & postretirement benefits - non-U.S. operations	151	171
Capitalized expenses currently recognized for tax	77	78
Other	37	49
Deferred tax liabilities	1,259	927
Valuation allowance	54	21
Balance sheet classifications:
Deferred tax assets	676	680
Deferred Tax Assets Related To Net Operating Loss
Deferred tax liabilities:
Valuation allowance	72	45
Other Noncurrent Assets
Balance sheet classifications:
Deferred tax assets	676	680
Other Noncurrent Liabilities
Balance sheet classifications:
Other liabilities	$ 565	$ 421