Pensions And Other Postemployment Benefits (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Contribution expense for the eligible employees	$ 43	$ 45	$ 45
Amount contributed to defined contribution pension plans	1
Current portion of postemployment benefit liability	37	40
Accumulated benefit obligation for all pension plans	1,636	1,669
Defined Benefit Plan, Future Amortization of Gain (Loss)	9
U.S.
Defined Benefit Plan Disclosure [Line Items]
Amount contributed to defined contribution pension plans	1	1	1
Italy
Defined Benefit Plan Disclosure [Line Items]
Amount contributed to defined contribution pension plans	1	1	1
France
Defined Benefit Plan Disclosure [Line Items]
Amount contributed to defined contribution pension plans	1	$ 1	$ 1
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Company contribute to its pension plans	$ 45
Weighted-average long-term rate of return on assets	5.55%	5.65%
U.S. Plans | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average Percentage of Company's asset allocation	12.00%
Defined benefit plan, target plan asset allocations	25.00%
U.S. Plans | Fixed Income Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average Percentage of Company's asset allocation	24.00%
Defined benefit plan, target plan asset allocations	25.00%
U.S. Plans | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average Percentage of Company's asset allocation	64.00%
Defined benefit plan, target plan asset allocations	50.00%
U.S. Plans | Investment Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average Percentage of Company's asset allocation	63.00%
Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contribute to its pension plans	$ 1
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Amount contributed to defined contribution pension plans	22	$ 20
Company contribute to its pension plans	23
Current portion of postemployment benefit liability	60	$ 59
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Company contribute to its pension plans	$ 29
Weighted-average long-term rate of return on assets	3.05%	3.22%
Non-U.S. Plans | Fixed Income Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations	30.00%
Non-U.S. Plans | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations	5.00%
Non-U.S. Plans | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations	65.00%