Pensions and Other Postretirement Benefits (Fair Values of the Company's Pension Plan Assets by Asset Category) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Total	$ 4,701	$ 4,750
Equity Securities | U.S. | US Large Cap
Fair values of pension plan assets	384	173
Equity Securities | U.S. | US Small Cap
Fair values of pension plan assets	172	146
Equity Securities | U.S. | Treasury Stock
Fair values of pension plan assets	85	244
Equity Securities | Non-U.S. | Developed Markets
Fair values of pension plan assets	812	578
Debt Securities | Cash and cash equivalents
Fair values of pension plan assets	115	499
Debt Securities | Corporate | Developed Markets
Fair values of pension plan assets	200	185
Debt Securities | Corporate | United States
Fair values of pension plan assets	881	998
Debt Securities | Diversified
Fair values of pension plan assets	698	639
Debt Securities | Government | Developed Markets
Fair values of pension plan assets	331	301
Debt Securities | Government | United States
Fair values of pension plan assets	237	265
Debt Securities | Other
Fair values of pension plan assets	188	182
Real Estate And Other
Fair values of pension plan assets	598	540
Level 1
Total	309	441
Level 1 | Equity Securities | U.S. | US Large Cap
Fair values of pension plan assets	6	1
Level 1 | Equity Securities | U.S. | US Small Cap
Fair values of pension plan assets	0	0
Level 1 | Equity Securities | U.S. | Treasury Stock
Fair values of pension plan assets	85	244
Level 1 | Equity Securities | Non-U.S. | Developed Markets
Fair values of pension plan assets	17	0
Level 1 | Debt Securities | Cash and cash equivalents
Fair values of pension plan assets	0	0
Level 1 | Debt Securities | Corporate | Developed Markets
Fair values of pension plan assets	0	0
Level 1 | Debt Securities | Corporate | United States
Fair values of pension plan assets	0	0
Level 1 | Debt Securities | Diversified
Fair values of pension plan assets	0
Level 1 | Debt Securities | Government | Developed Markets
Fair values of pension plan assets	0	0
Level 1 | Debt Securities | Government | United States
Fair values of pension plan assets	201	196
Level 1 | Debt Securities | Other
Fair values of pension plan assets	0	0
Level 1 | Real Estate And Other
Fair values of pension plan assets	0	0
Level 2
Total	3,760	3,790
Level 2 | Equity Securities | U.S. | US Large Cap
Fair values of pension plan assets	378	172
Level 2 | Equity Securities | U.S. | US Small Cap
Fair values of pension plan assets	172	146
Level 2 | Equity Securities | U.S. | Treasury Stock
Fair values of pension plan assets	0
Level 2 | Equity Securities | Non-U.S. | Developed Markets
Fair values of pension plan assets	795	578
Level 2 | Debt Securities | Cash and cash equivalents
Fair values of pension plan assets	115	499
Level 2 | Debt Securities | Corporate | Developed Markets
Fair values of pension plan assets	200	185
Level 2 | Debt Securities | Corporate | United States
Fair values of pension plan assets	750	922
Level 2 | Debt Securities | Diversified
Fair values of pension plan assets	698	635
Level 2 | Debt Securities | Government | Developed Markets
Fair values of pension plan assets	331	301
Level 2 | Debt Securities | Government | United States
Fair values of pension plan assets	36	69
Level 2 | Debt Securities | Other
Fair values of pension plan assets	161	155
Level 2 | Real Estate And Other
Fair values of pension plan assets	124	128
Level 3
Fair values of pension plan assets	632	519	341
Total	632	519
Level 3 | Equity Securities | U.S. | US Large Cap
Fair values of pension plan assets	0
Level 3 | Equity Securities | U.S. | US Small Cap
Fair values of pension plan assets	0
Level 3 | Equity Securities | U.S. | Treasury Stock
Fair values of pension plan assets	0
Level 3 | Equity Securities | Non-U.S. | Developed Markets
Fair values of pension plan assets	0
Level 3 | Debt Securities | Cash and cash equivalents
Fair values of pension plan assets	0
Level 3 | Debt Securities | Corporate | Developed Markets
Fair values of pension plan assets	0
Level 3 | Debt Securities | Corporate | United States
Fair values of pension plan assets	131	76
Level 3 | Debt Securities | Diversified
Fair values of pension plan assets	0
Level 3 | Debt Securities | Government | Developed Markets
Fair values of pension plan assets	0
Level 3 | Debt Securities | Government | United States
Fair values of pension plan assets	0
Level 3 | Debt Securities | Other
Fair values of pension plan assets	27	27
Level 3 | Real Estate And Other
Fair values of pension plan assets	$ 474	$ 412