CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Accounts receivable, allowance (dollars)	$ 47	$ 38
Customer relationships, accumulated amortization	2,968	2,660
Other intangible assets, accumulated amortization	$ 1,357	$ 1,247
Common stock, shares, issued (in shares)	1	1
Common stock, share outstanding (in shares)	1	1