Other Commitments And Contingencies (Tables)
 3 Months Ended
Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Guarantee Obligations
The total guarantees and indemnities in existence at March 31, 2016 and the years in which they expire were:
(in millions)
Total
2016
2017
2018
2019
2020
After
Guarantees of debt
$
2,750.0

$
—

$
—

$
500.0

$
—

$
750.0

$
1,500.0

Letters of credit
18.1

18.1

—

—

—

—

—

Total commercial commitments
$
2,768.1

$
18.1

$
—

$
500.0

$
—

$
750.0

$
1,500.0