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Employee Benefit Plans (Details 7) - Level 3 - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below |  |
Beginning Balance | $ 134 | $ 165
Actual Return on Plan Assets: |  |
Assets held at the reporting date | 2 | (32)
Assets sold during the period | 0 | 1
Purchases, Sales and Settlements | 10 | 0
Transfers in and/or out of Level 3 | (3) | 0
Ending Balance | 143 | 134
Corporate |  |
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below |  |
Beginning Balance | 19 | 25
Actual Return on Plan Assets: |  |
Assets held at the reporting date | 1 | 1
Assets sold during the period | 0 | 0
Purchases, Sales and Settlements | 10 | (7)
Transfers in and/or out of Level 3 | 0 | 0
Ending Balance | 30 | 19
Bank Loans |  |
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below |  |
Beginning Balance | 11 | 0
Actual Return on Plan Assets: |  |
Assets held at the reporting date | 0 | 0
Assets sold during the period | 0 | 0
Purchases, Sales and Settlements | 3 | 11
Transfers in and/or out of Level 3 | (3) | 0
Ending Balance | 11 | 11
Real Estate |  |
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below |  |
Beginning Balance | 60 | 97
Actual Return on Plan Assets: |  |
Assets held at the reporting date | 1 | (33)
Assets sold during the period | 0 | 1
Purchases, Sales and Settlements | (5) | (5)
Transfers in and/or out of Level 3 | 0 | 0
Ending Balance | 56 | 60
Other |  |
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below |  |
Beginning Balance | 44 | 43
Actual Return on Plan Assets: |  |
Assets held at the reporting date | 0 | 0
Assets sold during the period | 0 | 0
Purchases, Sales and Settlements | 2 | 1
Transfers in and/or out of Level 3 | 0 | 0
Ending Balance | $ 46 | $ 44

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- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets sold. + 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)(5)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held. + 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)(5)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of purchases, (sales), issuances and (settlements) 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)(2) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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