Employee Benefit Plans (Changes in Projected Benefit Obligations, Plan Assets and Funded Status) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 2,561
End balance	2,883	$ 2,561
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(78)	(124)
Accrued pensions	(729)	(740)		$ (759)	$ (748)	$ (712)
Other postretirement benefits	(699)	(724)		$ (767)	$ (755)	$ (720)
Pensions
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	3,252	5,349
Service cost	33	48	$ 57
Interest cost	98	142	196
Plan amendments	0	0
Actuarial losses (gains) - net	185	538
Benefits paid	(167)	(233)
Foreign currency translation adjustments	165	(141)
Settlements and curtailments	(85)	(2,354)
Defined Benefit Plan, Change in Benefit Obligation Attributable to Glass Segment	(1)	(96)
Other	(18)	(1)
Projected benefit obligation, End of year	3,462	3,252	5,349
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	2,561	4,627
Actual return on plan assets	289	470
Company contributions	87	204
Participant contributions	1	1
Benefits paid	(109)	(205)
Plan transfers	0	(3)
Plan settlements	(95)	(2,338)
Plan expenses and other-net	0	0
Foreign currency translation adjustments	149	(134)
Former glass business changes, net	0	(61)
End balance	2,883	2,561	4,627
Funded Status	(579)	(691)
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	173	110
Accounts payable and accrued liabilities	(23)	(61)
Accrued pensions	(729)	(740)
Other postretirement benefits	0	0
Liabilities held for sale	0	0
Net liability recognized	(579)	(691)
Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	792	1,084
Service cost	10	15	16
Interest cost	24	31	45
Plan amendments	0	(306)
Actuarial losses (gains) - net	(27)	13
Benefits paid	(48)	(53)
Foreign currency translation adjustments	8	2
Settlements and curtailments	0	0
Defined Benefit Plan, Change in Benefit Obligation Attributable to Glass Segment	(8)	6
Other	2	0
Projected benefit obligation, End of year	753	792	$ 1,084
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Funded Status	(753)	(792)
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	0	0
Accounts payable and accrued liabilities	(54)	(61)
Accrued pensions	0	0
Other postretirement benefits	(699)	(724)
Liabilities held for sale	0	(7)
Net liability recognized	$ (753)	$ (792)