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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Consolidated Statements of Comprehensive Income |  |  |
Unrealized gains (losses) on derivatives, tax | $ 8 | $ (2) | $ 3
Inventory adjustment for hedged natural gas |  | 2 |
Pension and postretirement gains, tax | (26) | (27) | 44
Distribution of stock of subsidiary to shareholders, tax |  |  | (14)
Reclassification to income of realized losses on derivatives, tax | (4) | (1) | (5)
Other comprehensive income (loss) related to noncontrolling interests | $ 0 | $ 0 | $ 0

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- Definition Amount of tax expense (benefit) related to (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 + Details
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