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Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2017
Accrued Income Taxes [Abstract]  
Income Tax Benefit (Expense) Reconciliation Table Income tax expense attributable to our loss before income taxes differs from the amounts computed using the applicable income tax rate as a result of the following factors:
 
Three months ended
 
Nine months ended
 
September 30,
 
September 30,
 
2017
 
2016
 
2017
 
2016
 
in millions
 
 
 
 
 
 
 
 
Computed “expected” tax benefit (a)
$
136.9

 
$
19.1

 
$
260.7

 
$
70.4

Change in valuation allowances (b):
 
 
 
 
 
 
 
Expense
(97.0
)
 
(21.5
)
 
(304.7
)
 
(256.6
)
Benefit
22.2

 
1.7

 
57.6

 
15.6

Non-deductible or non-taxable foreign currency exchange results (b):
 
 
 
 
 
 
 
Expense
(71.8
)
 
(2.6
)
 
(246.4
)
 
(4.9
)
Benefit
4.0

 
32.3

 
8.3

 
154.4

Non-deductible or non-taxable interest and other items (b):
 
 
 
 
 
 
 
Expense
(27.4
)
 
(82.7
)
 
(126.6
)
 
(127.9
)
Benefit
13.8

 
12.5

 
37.8

 
34.4

Basis and other differences in the treatment of items associated with investments in subsidiaries and affiliates (b):
 
 
 
 
 
 
 
Expense
(31.4
)
 
(15.3
)
 
(59.4
)
 
(112.4
)
Benefit
(0.4
)
 
18.7

 
2.2

 
37.5

Goodwill impairment
(43.5
)
 
—

 
(43.5
)
 
—

International rate differences (b) (c):
 
 
 
 
 
 
 
Benefit
57.0

 
47.8

 
136.0

 
124.8

Expense
(46.3
)
 
(22.2
)
 
(92.9
)
 
(45.2
)
Enacted tax law and rate change
1.9

 
(135.4
)
 
18.3

 
(140.6
)
Recognition of previously unrecognized tax benefits
4.9

 
14.5

 
13.8

 
32.4

Foreign taxes
2.7

 
(12.5
)
 
(10.6
)
 
(22.9
)
Tax effect of intercompany financing
0.9

 
40.6

 
(5.5
)
 
125.7

Other, net
5.7

 
(4.5
)
 
10.6

 
(1.3
)
Total income tax expense
$
(67.8
)
 
$
(109.5
)
 
$
(344.3
)
 
$
(116.6
)
_______________

(a)
The statutory or “expected” tax rates are U.K. rates of 19.25% for the 2017 periods and 20.0% for the 2016 periods. The statutory rate for the 2017 periods represents the blended rate that will be in effect for the year ended December 31, 2017 based on the 20.0% statutory rate that was in effect for the first quarter of 2017 and the 19.0% statutory rate that is in effect for the remainder of 2017.

(b)
Country jurisdictions giving rise to income tax benefits are grouped together and shown separately from country jurisdictions giving rise to income tax expenses.

(c)
Amounts reflect adjustments (either a benefit or an expense) to the “expected” tax benefit (expense) for statutory rates in jurisdictions in which we operate outside of the U.K.