v3.3.1.900

Retirement Benefits Plans Retirement Benefits Plans - Change in Plan Level 3 Assets (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $ 185 | $ 120 | $ 100
Gains (losses) relating to Level 3 assets still held at year-end | (6) | (2) |
Defined Benefit Plan, Purchases, Sales, and Settlements | 80 | 53 |
Defined Benefit Plan, Transfers Between Measurement Levels | (9) | (31) |
Real Estate Funds [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 7 | 6 | 6
Gains (losses) relating to Level 3 assets still held at year-end | 1 | 0 |
Defined Benefit Plan, Purchases, Sales, and Settlements | 0 | 0 |
Defined Benefit Plan, Transfers Between Measurement Levels | 0 | 0 |
Hedge Funds [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 92 | 54 | 0
Gains (losses) relating to Level 3 assets still held at year-end | (5) | 1 |
Defined Benefit Plan, Purchases, Sales, and Settlements | 43 | 53 |
Defined Benefit Plan, Transfers Between Measurement Levels | 0 | 0 |
Other Pension Plan Assets [Member] |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | 86 | 60 | $ 94
Gains (losses) relating to Level 3 assets still held at year-end | (2) | (3) |
Defined Benefit Plan, Purchases, Sales, and Settlements | 37 | 0 |
Defined Benefit Plan, Transfers Between Measurement Levels | $ (9) | $ (31) |

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- Definition Gains (losses) relating to Level 3 assets still held at year-end + References No definition available. + Details
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- Definition Amount of increase (decrease) in plan assets from purchases, sales and settlement of plan obligations. + 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 (d)(iv)(02)(B) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(iv)(02)(B) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920 + Details
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- Definition Transfers in and out of Level 3. For example, transfers due to changes in the observability of significant inputs. + 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 (d)(iv)(02)(C) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(iv)(02)(C) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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