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Stock-Based Compensation Programs (Details) $ / shares in Units, $ in Millions |  |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
May 16, 2017 | Jun. 30, 2016 USD ($) | Apr. 30, 2017 $ / shares shares | Jan. 31, 2017 $ / shares shares | Jul. 31, 2016 $ / shares | Jan. 31, 2016 $ / shares | Jun. 30, 2017 installment | Mar. 31, 2017 shares | Mar. 31, 2016 shares
Stock-Based Compensation Programs |  |  |  |  |  |  |  |  |
Stock split ratio | 2 |  |  |  |  |  |  |  |
Stock option and SSARs |  |  |  |  |  |  |  |  |
Stock-Based Compensation Programs |  |  |  |  |  |  |  |  |
Number of equal installments commencing one year from the date of grant | installment |  |  |  |  |  |  | 4 |  |
Vesting period |  |  |  |  |  |  | 1 year |  |
Expiration period of options |  |  |  |  |  |  | 10 years |  |
Granted (in shares) |  |  | 1,300,000 | 1,100,000 |  |  |  |  |
Weighted average fair value at grant date (in dollars per share) | $ / shares |  |  | $ 7.21 | $ 8.54 | $ 8.35 | $ 9.29 |  |  |
Weighted average assumptions used in estimation of fair values of options |  |  |  |  |  |  |  |  |
Expected dividend yield (as a percent) |  |  | 1.06% | 0.68% | 0.73% | 0.79% |  |  |
Expected stock price volatility (as a percent) |  |  | 18.89% | 20.49% | 24.14% | 29.25% |  |  |
Risk-free interest rate (as a percent) |  |  | 1.95% | 2.07% | 1.22% | 1.57% |  |  |
Expected life of options |  |  | 5 years 11 months 9 days | 5 years 11 months 9 days | 6 years 1 month 6 days | 5 years 11 months 9 days |  |  |
PCEQs |  |  |  |  |  |  |  |  |
Stock-Based Compensation Programs |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  | 3 years |  |
Weighted average assumptions used in estimation of fair values of options |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  | 237,452 | 237,510
PCEQs | Minimum |  |  |  |  |  |  |  |  |
Weighted average assumptions used in estimation of fair values of options |  |  |  |  |  |  |  |  |
Percent of participant PCEQ award assigned that determines the number of shares available at vesting date |  |  |  |  |  |  |  | 0.00% | 0.00%
PCEQs | Maximum |  |  |  |  |  |  |  |  |
Weighted average assumptions used in estimation of fair values of options |  |  |  |  |  |  |  |  |
Percent of participant PCEQ award assigned that determines the number of shares available at vesting date |  |  |  |  |  |  |  | 200.00% | 200.00%
PCEQs | Special Acquisition Related Incentive Plan |  |  |  |  |  |  |  |  |
Stock-Based Compensation Programs |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  | 1,100,000 |
PCEQs | Special Acquisition Related Incentive Plan | Minimum |  |  |  |  |  |  |  |  |
Weighted average assumptions used in estimation of fair values of options |  |  |  |  |  |  |  |  |
Percent of participant PCEQ award assigned that determines the number of shares available at vesting date |  |  |  |  |  |  |  | 0.00% |
PCEQs | Special Acquisition Related Incentive Plan | Maximum |  |  |  |  |  |  |  |  |
Weighted average assumptions used in estimation of fair values of options |  |  |  |  |  |  |  |  |
Percent of participant PCEQ award assigned that determines the number of shares available at vesting date |  |  |  |  |  |  |  | 200.00% |
Rexam |  |  |  |  |  |  |  |  |
Weighted average assumptions used in estimation of fair values of options |  |  |  |  |  |  |  |  |
Cash paid to settle awards vested through date of acquisition that was included in consideration paid for the acquisition | $ |  | $ 24 |  |  |  |  |  |  |

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- Definition Represents the number of equal installments commencing one year from date of grant over which the stock options vest. + References No definition available. + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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 Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Stock Split -URI http://asc.fasb.org/extlink&oid=6525746 + Details
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