CONDENSED CONSOLIDATED BALANCE SHEET (PARENTHETICALS) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Allowance for doubtful accounts	$ 19	$ 22
Accumulated depreciation, property, plant and equipment	$ 5,800	$ 5,484
Preferred Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred Stock, shares authorized (in shares)	250,000,000	250,000,000
Preferred Stock, shares issued (in shares)	0	0
Preferred Stock, shares outstanding (in shares)	0	0
Treasury Stock, shares (in shares)	76,670	0
Class A Common Stock [Member]
Common Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, shares authorized (in shares)	900,000,000	900,000,000
Common Stock, shares issued (in shares)	112,098,852	111,999,687
Common Stock, shares outstanding (in shares)	112,022,182	111,999,687
Class B Common Stock [Member]
Common Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, shares authorized (in shares)	25,000,000	25,000,000
Common Stock, shares issued (in shares)	0	0
Common Stock, shares outstanding (in shares)	0	0