CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Other intangible assets, accumulated amortization	$ 1,432	$ 1,383
Accounts receivable, allowance (dollars)	$ 49	$ 47
Common stock, shares, issued (in shares)	1	1
Common stock, share outstanding (in shares)	1	1
Common stock share outstanding	$ 10,050	$ 10,050
Customer Relationships
Customer relationships, accumulated amortization	$ 3,408	$ 3,264