Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 4) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
United States Qualified and Non-qualified Pension Benefits
Future Pension and Postretirement Benefit Payments
2015 Benefit Payments	$ 946
2016 Benefit Payments	964
2017 Benefit Payments	983
2018 Benefit Payments	1,010
2019 Benefit Payments	1,037
Following five years	5,381
International Qualified and Non-qualified Pension Benefits
Future Pension and Postretirement Benefit Payments
2015 Benefit Payments	209
2016 Benefit Payments	226
2017 Benefit Payments	237
2018 Benefit Payments	256
2019 Benefit Payments	273
Following five years	1,563
Postretirement Benefits
Future Pension and Postretirement Benefit Payments
2015 Benefit Payments	127
2016 Benefit Payments	139
2017 Benefit Payments	156
2018 Benefit Payments	160
2019 Benefit Payments	162
Following five years	$ 860

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Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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