CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ / shares in Millions, $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Accounts receivable, allowance (in dollars)	$ 47	$ 38
Common stock, share outstanding (shares)	1	1
Common stock, shares issued (shares)	1	1
Common stock outstanding, value	$ 10,050	$ 10,050
Common stock issued, value	$ 10,050	$ 10,050
Common stock, no par value	$ 10,050	$ 10,050