|
Shareholders' Equity (Details 3) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2013
|
Sep. 30, 2013
|
Jun. 30, 2013
|
Mar. 31, 2013
|
Dec. 31, 2012
|
Sep. 30, 2012
|
Jun. 30, 2012
|
Mar. 31, 2012
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Significant reclassifications from accumulated other comprehensive income to net income | |||||||||||
| Total amortization, before income taxes | $ 1,664 | $ 866 | $ (5,438) | ||||||||
| Income tax (benefit) expense | (258) | (50) | (324) | ||||||||
| Total amortization, net of income taxes | 233 | 546 | 307 | 321 | 456 | (381) | (304) | 10 | 1,407 | (219) | (5,754) |
|
Defined benefit pension plans | Amount Reclassified from Accumulated Other Comprehensive Income
|
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| Significant reclassifications from accumulated other comprehensive income to net income | |||||||||||
| Actuarial losses | 48 | 45 | 26 | ||||||||
| Prior service costs | (1) | (1) | |||||||||
| Settlements and curtailments | 1 | 3 | |||||||||
| Total amortization, before income taxes | 49 | 47 | 25 | ||||||||
| Income tax (benefit) expense | (4) | (5) | 13 | ||||||||
| Total amortization, net of income taxes | 45 | 42 | 38 | ||||||||
|
Defined benefit pension plans | Amount Reclassified from Accumulated Other Comprehensive Income | Operating and maintenance costs
|
|||||||||||
| Significant reclassifications from accumulated other comprehensive income to net income | |||||||||||
| Total amortization, net of income taxes | 37 | 31 | 17 | ||||||||
|
Defined benefit pension plans | Amount Reclassified from Accumulated Other Comprehensive Income | General and administrative costs
|
|||||||||||
| Significant reclassifications from accumulated other comprehensive income to net income | |||||||||||
| Total amortization, net of income taxes | $ 12 | $ 16 | $ 8 | ||||||||