XML 59 R40.htm IDEA: XBRL DOCUMENT v3.8.0.1
Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Movements Of Share Awards
Movements on share awards priced in U.S. Dollars during the years ended December 31, are detailed below:
 
2017
 
2016
 
2015
Millions of shares, except fair values
Time-Vested
 
Performance-Vested
 
Weighted Average Grant Date Fair Value ($)
 
Time-Vested
 
Performance-Vested
 
Time-
Vested
 
Performance-Vested
Unvested at the beginning of year
12.1

 
0.8

 
31.22

 
10.4

 
0.6

 
11.5

 
0.5

Granted during the year
5.3

 
0.3

 
32.23

 
6.5

 
0.4

 
4.1

 
0.3

Forfeited during the year
(0.4
)
 
—

 
31.51

 
(0.3
)
 
—

 
(0.2
)
 
—

Vested and distributed during the year
(5.0
)
 
(0.2
)
 
31.53

 
(4.5
)
 
(0.2
)
 
(5.0
)
 
(0.2
)
Unvested at the end of the year
12.0

 
0.9

 
31.52

 
12.1

 
0.8

 
10.4

 
0.6