Consolidated Statements of Comprehensive Income - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
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| Statement of Comprehensive Income [Abstract] | |||
| Net income | $ 2,986 | $ 2,821 | $ 2,162 |
| Net actuarial gains (losses) of defined benefit plans: | |||
| Adjustment, net of tax benefit (expense) of $36, $25 and ($60) | (74) | (46) | 105 |
| Recognized within Net income, net of tax benefit (expense) of ($25), ($21) and ($37) | 53 | 42 | 71 |
| Prior service (cost) credit of defined benefit plans: | |||
| Adjustment, net of tax benefit (expense) of ($11), $0 and $1 | 20 | (1) | (3) |
| Recognized within Net income, net of tax benefit (expense) of $0, $0 and $2 | 0 | 0 | (3) |
| Derivative instruments: | |||
| Recognized within Net income, net of tax benefit (expense) of ($1), ($1) and ($1) | 1 | 1 | 1 |
| Other comprehensive income (loss), net of taxes | 0 | (4) | 171 |
| Total comprehensive income | $ 2,986 | $ 2,817 | $ 2,333 |
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after tax of cost (credit) of benefit changes attributable to plan participants' prior service resulting from a plan amendment or plan initiation that has not been recognized in net periodic benefit cost (credit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- References No definition available.
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- Definition Amount after tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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