Contingencies and Commitments (Tables)

3 Months Ended

Mar. 31, 2013

Contingencies And Commitments Tables [Abstract]

Contingent Contractual Obligations

Contingent Contractual Obligations	Amount		Number of Agreements	Maximum Exposure Range for Each Agreement
	(in millions)			(in millions)
Guarantees and commitments	$	577	20	<$1 - $231
Cash collateralized letters of credit		254	13	<$1 - $169
Letters of credit under the senior secured credit facility		3	5	<$1 - $2
Total	$	834	38