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Share-Based Compensation
 9 Months Ended
Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
SHARE-BASED COMPENSATION
SHARE-BASED COMPENSATION
The company recognized total expenses of $124.5 million and $134.9 million related to equity-settled share-based payment transactions in the nine months ended September 30, 2018 and 2017, respectively.
Share Awards
Movements on share awards during the periods ended September 30, are detailed below:
 
For the nine months ended September 30, 2018
 
For the nine months ended September 30, 2017
Millions of shares, except fair values
Time- Vested
 
Performance- Vested
 
Weighted Average Grant Date Fair Value ($)
 
Time- Vested
 
Performance- Vested
Unvested at the beginning of period
12.0

 
0.9

 
31.52

 
12.1

 
0.8

Granted during the period
5.5

 
0.4

 
32.09

 
5.3

 
0.3

Forfeited during the period
(0.2
)
 
—

 
31.71

 
(0.4
)
 
—

Vested and distributed during the period
(4.6
)
 
(0.4
)
 
32.14

 
(4.8
)
 
(0.2
)
Unvested at the end of the period
12.7

 
0.9

 
31.55

 
12.2

 
0.9


The total fair value of shares that vested during the nine months ended September 30, 2018 was $156.1 million (nine months ended September 30, 2017: $158.0 million). The weighted average grant date fair value of the share awards that were granted during the nine months ended September 30, 2018 was $32.09 (nine months ended September 30, 2017: $32.21).
At September 30, 2018, there was $324.4 million of total unrecognized compensation cost related to non-vested share awards; that cost is expected to be recognized over a weighted average period of 2.61 years.