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SHARE-BASED COMPENSATION | 6 Months Ended
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Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
SHARE-BASED COMPENSATION | For the three months ended June 30, 2015, we incurred share-based compensation costs of $10 million (2014: $19 million) and recorded associated tax benefits of $4 million (2014: $3 million). For the six months ended June 30, 2015, we incurred share-based compensation costs of $29 million (2014: $37 million) and recorded associated tax benefits of $8 million (2014: $6 million). The fair value of shares vested during the six months ended June 30, 2015 was $71 million (2014: $65 million). At June 30, 2015 there were $135 million of unrecognized share-based compensation costs, which are expected to be recognized over the weighted average period of 2.5 years. Awards to settle in shares The following table provides a reconciliation of the beginning and ending balance of nonvested restricted stock (including restricted stock units) for the six months ended June 30, 2015:
|  | Performance-based Stock Awards |  | Service-based Stock Awards |
|  | Number of Restricted Stock |  | Weighted Average Grant Date Fair Value |  | Number of Restricted Stock |  | Weighted Average Grant Date Fair Value |
| Nonvested restricted stock - beginning of period | 347 |  |  | $ | 37.34 |  |  | 2,768 |  |  | $ | 38.70 |  |
| Granted | 104 |  |  | 53.32 |  |  | 556 |  |  | 51.69 |  |
| Vested | — |  |  | — |  |  | (1,109 | ) |  | 36.38 |  |
| Forfeited | (250 | ) |  | 34.42 |  |  | (29 | ) |  | 42.29 |  |
| Nonvested restricted stock - end of period | 201 |  |  | $ | 49.24 |  |  | 2,186 |  |  | $ | 43.13 |  |
Cash-settled awards During 2015 we also granted 486,508 restricted stock units that will settle in cash rather than shares when the awards ultimately vest; of which 18,659 restricted stock units are performance based and 467,849 restricted stock units are service based. At June 30, 2015, the corresponding liability for cash-settled units, included in other liabilities on the Consolidated Balance Sheet, was $20 million (2014: $9 million).

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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