Schedule II: Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2012

Schedule II: Valuation and Qualifying Accounts

Schedule II: Valuation and Qualifying Accounts

Allowance for Doubtful Accounts and Sales Credits	Balance at Beginning of Year		Additions		Usage			Balance at End of Year
	(In millions)
Year ended December 31, 2010	$	79	$	200	$	(178	)	$	101
Year ended December 31, 2011	$	101	$	214	$	(182	)	$	133
Year ended December 31, 2012	$	133	$	1,263	$	(815	)	$	581

Note: Additions to the allowance for doubtful accounts are charged to expense. Additions to the allowance for sales credits are charged against revenues.

All other schedules have been omitted because they are not required, not applicable, or the required information is otherwise included.