Net Periodic Benefit Cost for Pension and Postretirement Benefit Plans (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
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Defined Benefit Pension Plan | U.S. Pension Benefits | ||||
Net Periodic Cost: | ||||
Service cost | $ 415 | $ 389 | $ 831 | $ 779 |
Interest cost | 450 | 462 | 899 | 924 |
Expected return on assets | (800) | (712) | (1,601) | (1,424) |
Amortization of prior service cost | 48 | 48 | 97 | 96 |
Net periodic benefit cost | 113 | 187 | 226 | 375 |
Defined Benefit Pension Plan | International Pension Benefits | ||||
Net Periodic Cost: | ||||
Service cost | 16 | 14 | 32 | 29 |
Interest cost | 11 | 10 | 23 | 20 |
Expected return on assets | (19) | (16) | (39) | (32) |
Amortization of prior service cost | 0 | 0 | 0 | 0 |
Net periodic benefit cost | 8 | 8 | 16 | 17 |
U.S. Postretirement Medical Benefits | ||||
Net Periodic Cost: | ||||
Service cost | 7 | 7 | 14 | 14 |
Interest cost | 26 | 28 | 52 | 56 |
Expected return on assets | (2) | (1) | (4) | (3) |
Amortization of prior service cost | 2 | 2 | 4 | 4 |
Net periodic benefit cost | $ 33 | $ 36 | $ 66 | $ 71 |
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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