Income Taxes (Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Accrued expenses not currently deductible		$ 582	$ 586
Differences related to non-U.S. operations	[1]	127	120
Accrued retirement & postretirement benefits		629	630
Net operating losses	[2]	56	70
Income currently recognized for tax		71	70
Foreign tax credit carryforwards		0	20
Other		50	49
Total, deferred tax assets		1,515	1,545
Deferred tax liabilities:
Differences related to non-U.S. operations		217	176
Depreciation and amortization		377	368
Accrued retirement & postretirement benefits - non-U.S. operations		10	94
Other		14	6
Total, deferred tax liabilities		618	644
Valuation allowance, amount		3	9
Balance sheet classifications:
Deferred tax assets		1,097	1,138
Deferred Tax Assets Related To Net Operating Loss
Deferred tax liabilities:
Valuation allowance, amount		17	19
Other Noncurrent Assets
Balance sheet classifications:
Deferred tax assets		1,097	1,138
Other Noncurrent Liabilities
Balance sheet classifications:
Other liabilities		$ 200	$ 237

[1] Net of valuation allowances of $3 million in 2016 and $9 million in 2015.

[2] Net of valuation allowances of $17 million in 2016 and $19 million in 2015.