XML 45 R28.htm IDEA: XBRL DOCUMENT
v3.8.0.1

New Accounting Standard (Unaudited) (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract] |
Impact of Adopting New Accounting Standards | The impact of adopting this ASU for the three months ended March 31, 2017, follows (in millions):
|  | Previously Reported |  | Impact of Adoption |  | Current Presentation
Production and delivery |  | $ | 2,200 |  |  | $ | (12 | ) |  | $ | 2,188 |
Total cost of sales |  | 2,589 |  |  | (12 | ) |  | 2,577 |
Selling, general and administrative expenses |  | 153 |  |  | (2 | ) |  | 151 |
Mining exploration and research expenses |  | 15 |  |  | (1 | ) |  | 14 |
Environmental obligations and shutdown costs |  | 27 |  |  | (2 | ) |  | 25 |
Total costs and expenses |  | 2,761 |  |  | (17 | ) |  | 2,744 |
Operating income |  | 580 |  |  | 17 |  |  | 597 |
Other income, net |  | 25 |  |  | (17 | ) |  | 8 |
The impact of adopting this ASU for the three months ended March 31, 2017, follows (in millions):
|  | Previously Reported |  | Impact of Adoption |  | Current Presentation
Other, net included in cash flow from investing activities |  | $ | (21 | ) |  | $ | 4 |  |  | $ | (17 | )
Cash flow from investing activities |  | (365 | ) |  | 4 |  |  | (361 | )
Net decrease in cash, cash equivalents, restricted cash and restricted cash equivalents |  | (252 | ) |  | 4 |  |  | (248 | )
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year |  | 4,245 |  |  | 158 |  |  | 4,403 |
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period |  | 4,001 |  |  | 162 |  |  | 4,163 |

X
- References No definition available. + Details
Name: | us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e765-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e725-108305 + Details
Name: | us-gaap_ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration