Investments In and Advances To Affiliates (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Apr. 11, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Investments in and Advances to Affiliates [Line Items]
Operating margin		$ 754	$ 819	$ 1,475	$ 1,613
Net income		$ 264	$ 275	518	341
Acquisitions, net of cash acquired				18	728
Proceeds from Interests in Affiliate				2	890
Minority Owned Affiliates [Member]
Investments in and Advances to Affiliates [Line Items]
Revenue				357	568
Operating margin				86	150
Net income				$ 35	$ 107
guacolda [Member]
Investments in and Advances to Affiliates [Line Items]
Acquisitions, net of cash acquired	$ 728
Proceeds from Interests in Affiliate	$ 730