v3.3.1.900
Pension And Other Postretirement Benefits (Long-Term Rates Of Pension And Other Postretirement Benefits) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]      
Total recorded in other comprehensive income $ (5,535) $ 4,619 $ (7,281)
Pension Benefits - U.S. [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 4.00% 5.00% 4.00%
Long-term rate of return on funded assets 7.00% 7.25% 7.25%
Long-term rate of compensation increase 5.75% 5.75% 5.75%
Service cost $ 864 $ 677 $ 801
Interest cost 785 807 749
Expected return on plan assets (830) (799) (835)
Amortization of actuarial loss/(gain) 544 409 646
Amortization of prior service cost 6 8 7
Net pension enhancement and curtailment/settlement cost 499 276 723
Net periodic benefit cost 1,868 1,378 2,091
Net actuarial loss/(gain) 592 2,494 (1,302)
Amortization of actuarial (loss)/gain (1,043) (685) (1,369)
Prior service cost/(credit)   (25)  
Amortization of prior service (cost)/credit (6) (8) (7)
Total recorded in other comprehensive income (457) 1,776 (2,678)
Total recorded in net periodic benefit cost and other comprehensive income, before tax $ 1,411 $ 3,154 $ (587)
Pension Benefits - Non-U.S. [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 3.10% 4.30% 3.80%
Long-term rate of return on funded assets 5.90% 6.30% 6.40%
Long-term rate of compensation increase 5.30% 5.40% 5.50%
Service cost $ 689 $ 590 $ 697
Interest cost 850 1,138 1,076
Expected return on plan assets (1,094) (1,193) (1,128)
Amortization of actuarial loss/(gain) 730 628 852
Amortization of prior service cost 87 120 117
Net pension enhancement and curtailment/settlement cost 22   22
Net periodic benefit cost 1,284 1,283 1,636
Net actuarial loss/(gain) (1,375) 2,969 (1,938)
Amortization of actuarial (loss)/gain (752) (628) (874)
Prior service cost/(credit) (401) (70) 30
Amortization of prior service (cost)/credit (87) (120) (117)
Foreign exchange rate changes (1,126) (688) (155)
Total recorded in other comprehensive income (3,741) 1,463 (3,054)
Total recorded in net periodic benefit cost and other comprehensive income, before tax $ (2,457) $ 2,746 $ (1,418)
Other Postretirement Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 4.00% 5.00% 4.00%
Long-term rate of return on funded assets 7.00% 7.25% 7.25%
Long-term rate of compensation increase 5.75% 5.75% 5.75%
Service cost $ 170 $ 140 $ 176
Interest cost 346 383 352
Expected return on plan assets (28) (37) (41)
Amortization of actuarial loss/(gain) 206 116 228
Amortization of prior service cost (24) 14 21
Net periodic benefit cost 670 616 736
Net actuarial loss/(gain) (589) 1,518 (1,290)
Amortization of actuarial (loss)/gain (206) (116) (228)
Prior service cost/(credit) (535)    
Amortization of prior service (cost)/credit 24 (14) (21)
Foreign exchange rate changes (31) (8) (10)
Total recorded in other comprehensive income (1,337) 1,380 (1,549)
Total recorded in net periodic benefit cost and other comprehensive income, before tax $ (667) $ 1,996 $ (813)