Income Taxes (Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Accrued expenses not currently deductible		$ 526	$ 369
Differences related to non-U.S. operations	[1]	170	139
Accrued retirement & postretirement benefits		406	394
Net operating losses	[2]	48	67
Income currently recognized for tax		20	49
Other		16	31
Total, deferred tax assets		1,186	1,049
Deferred tax liabilities:
Differences related to non-U.S. operations		287	235
Depreciation and amortization		342	338
Accrued retirement & postretirement benefits - non-U.S. operations		171	172
Capitalized expenses currently recognized for tax		78	0
Other		49	16
Total, deferred tax liabilities		927	761
Valuation allowance, amount		21	18
Balance sheet classifications:
Deferred tax assets		680	669
Deferred Tax Assets Related To Net Operating Loss
Deferred tax liabilities:
Valuation allowance, amount		45	11
Other Noncurrent Assets
Balance sheet classifications:
Deferred tax assets		680	669
Other Noncurrent Liabilities
Balance sheet classifications:
Other liabilities		$ 421	$ 381

[1] Net of valuation allowances of $21 million in 2018 and $18 million in 2017.

[2] Net of valuation allowances of $45 million in 2018 and $11 million in 2017.