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Comprehensive Income
9 Months Ended
Sep. 30, 2011
Equity [Abstract] 
Comprehensive Income
Comprehensive Income
The following table sets forth the after-tax components of comprehensive income:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2011
 
2010
 
2011
 
2010
 
(Dollars in millions)
Net income
$
281.5

 
$
236.3

 
$
752.4

 
$
587.2

Net increase (decrease) in fair value of cash flow hedges, net of income taxes
(197.4
)
 
268.1

 
(100.6
)
 
135.9

Net unrealized losses on available-for-sale securities, net of income taxes
(4.5
)
 
—

 
(4.3
)
 
—

Change in actuarial loss and prior service cost associated with postretirement plans and workers’ compensation obligations, net of income taxes
10.2

 
11.2

 
33.7

 
27.2

Comprehensive income
$
89.8

 
$
515.6

 
$
681.2

 
$
750.3


Comprehensive income differs from net income by the amount of unrealized gains or losses resulting from valuation changes of the Company’s cash flow hedges (see Note 5 and Note 6) or its available-for-sale securities (see Note 3) and the change in actuarial loss and prior service cost (see Note 9) during the periods presented. None of the reconciling items between net income and comprehensive income relates to the Company’s noncontrolling interests for the periods presented.