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Postemployment Benefit Plans (DefCont) (Details) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2017 | Dec. 31, 2016 USD ($) plan | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Defined contribution plans |  |  |  |
Number of defined contribution plans sponsored by the entity (in plans) | plan |  | 4 |  |
Contribution expense | $ |  | $ 51 | $ 89 | $ 84
U.S. Savings Plan |  |  |  |
Defined contribution plans |  |  |  |
Matching contribution as a percentage of participant's base salary |  | 10.00% |  | 6.00%
Non-U.S. Savings Plan |  |  |  |
Defined contribution plans |  |  |  |
Matching contribution as a percentage of participant's base salary | 12.00% | 6.00% |  |
Non-U.S. Savings Plan | Minimum |  |  |  |
Defined contribution plans |  |  |  |
Additional matching contribution as a percentage of participant's base salary |  | 4.50% |  |
Non-U.S. Savings Plan | Maximum |  |  |  |
Defined contribution plans |  |  |  |
Additional matching contribution as a percentage of participant's base salary |  | 6.50% |  |
U.K. | Non-U.S. Savings Plan | Minimum |  |  |  |
Defined contribution plans |  |  |  |
Matching contribution as a percentage of participant's base salary |  | 4.50% |  |
U.K. | Non-U.S. Savings Plan | Maximum |  |  |  |
Defined contribution plans |  |  |  |
Matching contribution as a percentage of participant's base salary |  | 9.50% |  |

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- Definition Represents the percentage of employee's gross pay, based on the employee's years of eligible service for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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