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EMPLOYEE RETIREMENT PLANS - Pre-tax Expense (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($) plan | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Pre-tax expense |  |  |
Number of regional multi-employer pension plans in which the entity participates | plan | 1 |  |
Pre-tax expense | $ 92 | $ 84 | $ 68
Defined-benefit pension plans |  |  |
Pre-tax expense |  |  |
Pre-tax expense | 34 | 32 | 25
Defined-contribution plans |  |  |
Pre-tax expense |  |  |
Pre-tax expense | $ 58 | $ 52 | $ 43

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- Definition Represents the number of regional multi-employer pension plans in which the entity participates. + References No definition available. + Details
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- Definition The amount of pension benefit costs recognized during the period for (1) defined benefit plans and (2) defined contribution plans. For defined benefit plans, pension expense includes the following components: service cost, interest cost, expected return on plan assets, gain (loss) on plan assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. For defined contribution plans, the pension expense generally equals the firm's contribution to employees' accounts (if the firm contributes) during the period. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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